lindadi wrote:
I am trying to calculate finance charges on an invoice at a rate of 1.8% per
month. This is to send to a customer. Can someone please tell me how to do
this. Thanks very much in advance!!

If A1 contains the balance due, the following computes one month's
finance charges:

=round(A1*1.8%, 2)

ROUND() rounds the amount to the cent, assuming a centidecimal currency
system (e.g. US).

If that formula is in A2, the total amount due is:

=A1+A2