Fix currency error automatically adding 0000 (4 zeros) to the amount

Hi WP Ever Admin
First of all, thank you very much for your open source addon sharing.
It’s amazing.
But I would like to report a very annoying bug that messed up the currency calculation when I removed the 2 00s after the “,” of the currency.
Exp: Precision = 2 | and now set: Precision = 0
Problem: When creating a new expense voucher or income money voucher, I set the currency amount to : 100,000
Then save
Then the invoice will show the currency as 1,000,000,000 VND
=> It’s more than 4 zeros @@
Please check again and fix this error. Thank you so much