For each of the following transactions for the Sky Blue Corporation, give the accounting equation effects of the adjustments required at the end of the month on October 31.

a. Collected $2,250 rent for the period October 1 to December 31, which was credited to Unearned Revenue on October 1.
b. Paid $1,080 for a two-year insurance premium on October 1 and debited Prepaid Insurance for that amount.
c. Used a machine purchased on October 1 for $42,000. The company estimates annual depreciation of $4,200