a. Collected $3,600 rent for the period December 1 of the current year to April 1 of next year, which was credited to Unearned Rent Revenue on December 1. b. Purchased a machine for $38,000 cash on January 1. The company estimates annual depreciation at $4,400. c. Paid $3,600 for a two-year insurance premium on July 1 of the current year; debited Prepaid Insurance for that amount