Forrest Company faced the following situations. Journalize the adjusting entry needed at December 31, 2012, for each situation. Consider each fact separately.

a. The business has interest expense of $9,000 that it must pay early in January 2013.

b. Interest revenue of $4,300 has been earned but not yet received.

c. On July 1, when the business collected $13,900 rent in advance, it debited Cash and credited Unearned Rent Revenue. The tenant was paying for two years’ rent.

d. Salary expense is $1,300 per day—Monday through Friday—and the business pays employees each Friday. This year, December 31 falls on a Wednesday.

e. The unadjusted balance of the Supplies account is $2,900. The total cost of supplies on hand is $1,600.

f. Equipment was purchased at the beginning of this year at a cost of $140,000. The equipment’s useful life is five years. There is no residual value. Record depreciation for this year and then determine the equipment’s book value.