Consider the following independent situations at December $31$: a$.$ On April $1,$ a business collected $$3,600$ rent in advance, debiting Cash and crediting Unearned Revenue. The tenant was paying one year$$s rent in advance. On December $31,$ the business must account for the amount of rent it has earned.

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

c$.$ The business purchased equipment on September $1$ at a cost of $$40,400$ with expected useful life of four years. The residual value of the equipment is $$2,000.$

d$.$ The business receives $$5,000$ on November $1$ for $10-$month service contract for the period November $1$ through August $31.$

e$.$ On October $1,$ when the business prepaid $$2,400$ for a two$-$year insurance policy, the business debited Prepaid Insurance and credited Cash.

Journalize the adjusting entry needed on December $31$ for each situation assuming the company only records adjusting entries at the end of the year. Use the letters to label the journal entries.