Explanation

Lui was looking for lands where he could grow his own crops. He got a good plot near to where his sand mines would be for 3000G. He quickly finalised the deal and that left him with 7000 more.

Finances were always bad news for Lui. He set aside 2000G for his own expenses and with the remaining 5000G, he would have to look for shops near his own. Then he would combine it into one big supermarket. One day maybe..

But now dinner comes.

"So Lui, what did you do today? I heard our neighbors chattering about the smoke coming from the forest. " Isabella enquired Lui about his whereabouts for the day as Lui laughed nervously. How was he going to explain it to his mother? "Well I was making pots. I maybe also bought 4 Hectares of land near the Ruh beach. And some parts of the beach from the Baron of Lump." Isabella's eyes widened. "How much did it all cost? " She asked in a sweet voice. Luis smiled nervously and said"3000G."

Bahm!

Lui nearly dodged the plates that were coming for his head. "I will make 20000G this month. " He exclaimed. "How do you plan to do that? " Harry asked. He was quite surprised by Luis's expenditure but did not say much as he was a grown man now. "I will expand the shop. Also I will find a method to preserve food for days so that we can cut the costs of daily supplies." Lui explained his plans to Harry. "Well, good luck then" Harry wished Lui as he turned in for the night. "Mom, do you have this month's records? " Lui asked his mother whose anger had calmed down by now.

"Parchment costs more than the shop itself. So where will we keep the records? "

Paper.