Answer:
1. Prepare journal entries to record the sale of merchandise (omit any entry that might be required for the cost of the goods sold), any December 31, 2021 interest accrual, and the March 31, 2022 collection.
June 30, 2021, merchandise sold in exchange for note receivable
Dr Notes receivable 40,000
Cr Sales revenue 37,600
Cr Unearned interest revenue 2,400
December 31, 2021, accrued interests (= $2,400 x 6/9)
Dr Unearned interest revenue 1,600
Cr Interest revenue 1,600
March 31, 2022, note receivable is collected
Dr Cash 40,000
Cr Note receivable 40,000
Dr Unearned interest revenue 800
Cr Interest revenue 800
2. What is the effective interest rate on the note
effective period rate = $2,400 / $37,600 = 6.3829% (for 9 months)
annual rate = 6.3829% x 12/9 = 8.51%