1) ABC Limited has received an invoice of $23680 less 12% less 8% on June 20th with terms 3/10, n/30, ROG for a package or machinery which were received on July 15th.

a) How much should be paid on July 20th if they want to reduce the outstanding balance to $15000?

b) How much more (after the payment on 20th) should be paid on July 25th if they want to reduce the debt by $10,000?

c) What is the overall balance after the second payment is made?