A company received an invoice for $2882.21 dated May 8 with terms 5/10, 1/30, n/60

a.) If the invoice is paid on May 13, how much is to be paid?

b.)If the invoice is paid on June 1st , how much is to be paid?

c.)If the invoice is paid on July 5, how much is to be paid?

Round the final answer to the nearest cent. Please provide a detailed answer on the paper so I know how to do it next time.