Sheridan Service received an invoice dated September 25 from Wolfedale Automotive. The invoice amount was $2540.95, and the payment terms were 3/10, 1/20, n/30. Sheridan Service made a payment on October 5 to reduce the balance due by $1200, made a second payment on October 15 to reduce the balance to $600, and paid the remaining balance on October 25.
(a) How much did Sheridan Service pay on October 5?
(b) How much did it pay on October 15?
(c) What was the amount of the final payment on October 25?