Each of the following independent events requires a year-end adjusting entry. Show how each event 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 $4,800 cash in advance on October 1 for a one-year insurance policy. b. Received a $3,600 cash advance for a contract to provide services in the future. The contract required a one-year commitment, starting April 1. c. Purchased $1,200 of supplies on account. At year's end, $175 of supplies remained on hand. d. Pald $9,600 cash in advance on August 1 for a one-year lease on office space. Event/ Adjustment The Accounting Equation Total Assets Other Cash Liabilities Assets (4,800) 4,800 - (1.200) = Stockholders' Equity Common Retained Stock Earnings a. + a. Adi b. (1,200) b. Adi C. + c. Adj d d. Adi +