After Jiayi went back, Dai'er couldn't help but ask, "Teacher, don't you want to teach Jiayi?"

"No, he's very talented, he's a quick learner, and I'd love to have such a student. Im said.

"But he couldn't come up with 100 gold coins. And it's a hundred a year. Daile was a little dissatisfied, and her unconscious tone was a little heavy.

Im said, "You can take this as a test, as a mage, you can't do without money. No matter what he does, as long as he can scrape together 100 gold coins, I will not break my word. At the very least, he can sell himself to Dai'er. ”

"I don't have 100 gold coins. Dale didn't react and continued, "Teacher, did my father really give 100 coins a year for tuition?"

"Of course, and not only that, in the future, you will also have to provide your father with the magic materials you will use when learning spells. Depending on how well you have learned, the annual cost is not a small amount, and if you study for ten years in a row and do not achieve anything, I am afraid that this territory will be defeated. ”

"So much?" exclaimed both Flower and Dale at the same time.

Imu's eyes were a little lonely, and he said, "Do you think learning magic is a simple thing, many times, money is just the basics. ”

......

On the way back, Jia Yi kept thinking about how to solve this tuition. 100 gold coins doesn't seem like much, but when converted into RMB, 100W is less, about 8 or 90W. Hold the grass, which school has such expensive tuition?

Jia Yijia is now opening a store in the town, and the business is better, with a balance of about 5 or 6 gold coins a year, when there was no store before, the gross profit from selling bread was 5 or 6 gold coins a year, and now it is much more. But even if all this money is given to Jiayi, it will take more than 10 or 20 years to be enough.

By night, he still had no clue.

I don't know if it's okay to sell gunpowder to Im, I saw that he was very interested in gunpowder that time, why don't you sell him the formula?

But it is estimated that it will not be sold for a few bucks. After all, black powder has limitations, its power is limited, and if you want to have enough damage, you have to forge a cannon, but you listen to a mage with a cannon just to send out cannonballs with the same power as fireball. The fireball can still be located, and the accuracy of the cannon doesn't know where to go.

The only good thing is probably that the cannon shoots far, shoot!

And Jiayi doesn't really want to sell gunpowder, although the power of gunpowder is limited, but it's also a long-range weapon, and it still has some advantages over bows and arrows.

When I last explored, there was a primitive cave, how come there are no antiques in it, and I don't know if others recognize it, a stone axe made of stone from 65 million years ago, don't want 2998, don't want 1998, just 998, as long as 998, take the ancient stone axe home.

Jia Yiyi will think about what he has valuable, and then complain that Master Imu wants money for death, and it is so expensive, seeing that he is so smart and talented, shouldn't he cry and rush to accept the apprentice?

Then I thought about it, and felt that it was actually nothing to collect money, after all, knowledge is priceless, and it is also magical knowledge, which can change a person's fate. After all, Elder Tang still has to give personnel to obtain the true scriptures, but he wants too much money.

Inexplicably, a joke comes to mind, money is not the problem, the problem is no money. This is the current state of Jiayi, and I don't know if I can get a mortgage.

Kaichi was rolling around on the bed, and the younger brother next to him was already asleep.

He couldn't help but think that if he had sold salt at that time, he would probably have made money. Since ancient times, salt has been a profiteering industry, whether it is smuggling, normal salt sales or official sales, it has made a lot of money. However, if he really went to sell salt, the grave grass would be a few feet tall by now.

Salt, it suddenly occurred to Jia Yi that he couldn't sell it himself, but the mage should be able to. It should be possible to sell the process of boiling salt and filtration to a mage, at least at least, for a year's tuition.

The next day, instead of going to the lord's mansion to deliver breakfast, he began to make salt. There is no evidence for empty words, and some samples are shown in general. Although Jia Yi has not sold salt since the first time, the salt used in his family over the years has been made by himself, and after it is done, he adds some bran and pretends to be ordinary salt.

For the family, of course, it is said that it is taught by the medicine elder.

After making the salt, Jiayi also took a piece of paper, wrote down the detailed steps, and added sketches. Next, it's time to see how Imu quotes.

To be honest, Jia Yi doesn't like this way, everything is pinned on other people's character, and the limitations are too great. But what can we do if we don't? Both Kaichi and the author are just otakus, and they can't think of a better plan.

Another day passed, and on the third day, Kaichi began to make breakfast again and send it to the lord's mansion, bringing salt and the method of making salt.

Seeing Jiayi, Dai'er complained and said, "Why didn't you come yesterday? We didn't have breakfast, why did you come again today? I thought you wouldn't be here until you raised enough money. ”

Daile thought that Jiayi hadn't found a way to raise money, so she came here to ask for help.

Im didn't think as much as Dale did, and said, "Looks like you've already raised the money?"

"No," said Kaichi, "I would like to ask, do you need gold coins, or something of equal value, such as a new technology or an antique gem?"

"Of course, after all, 100 gold coins are also seven or eight pounds (400g a pound here, as mentioned earlier). ”

When Dale and Flower heard Jiayi say this, they were also interested and gathered around, thinking that Jiayi had come over with something good.

Kaichi opened a paper bag he was carrying with him and placed it in front of their eyes, only to see that it was snow-white fine salt.

Flower looked at Jia Yi and said puzzledly: "This is snow salt, I know, a pound of good snow salt is worth about 100 copper, but the teacher wants gold coins? One is copper and the other is gold, and the difference in the middle is almost 10,000 times." ”

I can't imagine that Flor's arithmetic is not bad. Imu also looked at Kaichi, but he was more able to hold his breath and didn't speak in a hurry.

Sure enough, Jia Yi continued: "This is what I made, purified from the salt mine!"

"Oh?" Imu was slightly stunned, stretched out his finger and dipped a little salt and tasted it, no problem, it was pure salt.

"You want to..."

"Teacher, I would like to sell you the method of purifying coarse salt to make snow salt, and convert it into tuition. Jia Yi said.

"Oh (second voice), it depends on how you make it, the easier it is, the higher the price I give. Im looked like he wasn't expecting.

"Teacher, this method is very simple and easy to make, mainly in filtration and purification. Teacher, look..."Kaichi opened the drawings he had brought and said to Imu.

"Sure enough, it is very ingenious and simple, and I can't imagine that it is so simple to solve the purification method of snow salt. Im couldn't help the admiration in his eyes, and continued, "In the past, snow salt had to be made by using clear salt lake water, but with this method, even Cyber Collar can make snow salt. ”

The salt industry is the pillar industry of Cyberling, and with snow salt, you can increase a lot of income, and you are not afraid that you will run out of money for experiments in the future.

"How did you come up with this method, Kaichi. Imu asked.

"My teacher told me that charcoal can absorb impurities, so I thought, if you absorb the impurities in the salt, isn't it pure snow salt? With the help of my teacher, I was able to make snow salt. It's just that the teacher said that this was too big to let me go out and sell it. ”

Im said, "Your teacher is a wise man, and he is not wrong. ”

He looked at the drawings and said, "Let's try it according to your method, if there is an effect you said, I will count your tuition for 10 years and the money for future experiments as part of you." ”

For the next time, they stopped attending classes, and began to filter salt water with charcoal packets in the yard and boil salt, following Jiayi's method.