On December 31, 2020, Pronghorn Company acquired a computer from Plato Corporation by issuing a $650,000 zero-interest-bearing note, payable in full on December 31, 2024. 

Pronghorn Company's credit rating permits it to borrow funds from its several lines of credit at 12%. The computer is expected to have a 5-year life and a$76,000 salvage value.

Prepare any necessary adjusting entries relative to depreciation(use straight-line) and amortization (use effective-interest method) on December 31, 2021.