An invoice received for an electric bicycle has terms of 3/15 30 x and is dated May 20. The amount of the invoice is RM4,402.58, and a partial payment of RM3,250 is made on July 1. a. the credit given for the partial payment. (3 Marks) b. the balance due on the invoice. (2 Marks) c. the amount of cash discount. (1 Mark)