E10-15. Page538 (Purchase of Computer with Zero-Interest-Bearing Debt) Cardinals Corporation purchased a computer on December 31,2016, paying $30,000 down and agreeing to pay the balance in five equal installments of $15,000 payable each December 31 beginning in 2017 . An assumed interest rate of 10% is implicit in the purchase price. (Round to two decimal places.) (a) Prepare the journal entry (ies) at the date of purchase. ) Prepare the journal entry (ies) at December 31, 2017, to record the payment and interest (b (effective-interest method employed). (c) Prepare the journal entry (ies) at December 31, (effective-interest method employed). 2018, to record the payment and interest