Each of the following independent events requires a year-end adjusting entry. Show how each event and it's related adjusting entry affect the accounting equation. Assume a December 31 closing date. The first event is recorded as an example. (Do not round intermediate calculations. Enter any decreases to account balances with a minus sign. Not all cells require input).

a. Paid $4800 cash in advance on October 1 for a one-year insurance policy.

b. Received a $3600 cash advance for a contract to provide services in the future. The contract required a one-year commitment, starting April 1. c. Purchased $1200 of supplies on account. At year's end, $175 of supplies remained on hand.

d. Paid $9600 cash in advance on August 1 for a one-year lease on office space.