Calculator for properly filling in Peru Bill. Includes General Sales Tax (IGV)

Calculation of IGV
Only you need to enter a value: base amount, IGV or the total amount.
INSTANTLY it is displayed as a result:
  -> Base Amount in numbers with two decimals.
  -> IGV, in numbers with two decimals
  -> TOTAL AMOUNT in numbers with two decimals.

Additional data required for an invoice.
  -> correct spelling of the total amount in words.
  -> system date to write on the invoice.