Required Each of the following independent ovents requires a year-end adjusting entry. Show how cach ovent and its related adjusting entry affect the accounting equation. Assume a December 31 closing date. The first event is shown as an example. (Do not round intermediate calculations. Enter any decreases to account balances with a minus sign.) a. Paid $6,700 cash in advance on April 1 for a one-year insurance policy. b. Received a $15,540 cosh advance for a contract to provide services in the future. The contract required a one-year commitment, starting September 1 . c. Purchased $1,950 of supplies on account. At year's end, $170 of supplies remained on hand. d. Paid $5,550 cash in advance on March 1 for a one-year lease on affice space