The most valuable part of the microscope is actually the curvature calculation, which can even be considered a technological barrier.
However, when Xu Yun was estimating, he subconsciously omitted his own contribution.
After all, from the perspective of later generations, he had only done a minor job and it was decent enough not to be replaced by someone more competent.
Xiaoli nodded thoughtfully and said:
"I've heard of Master Qi's craftsmanship. Last year, a business association in Hebei Dao re-forged a waterwheel and hired Master Qi at a high price.
The president of that business association was a schoolmate of my father's. When he visited our house at the beginning of the year, I vaguely heard him say that Master Qi's wages were almost three thousand coins per day, plus miscellaneous items and so on..."
Xiaoli counted on his fingers for a while and finally said:
"So, the cost of a microscope is about one hundred and fifty coins?"
Xu Yun thought for a moment and nodded:
