Larson Co., whose accounting period ends on December 31, purchased a machine for $6,800 on January 1 with an estimated residual value of $800 and estimated useful life of 10 years. Prepare amortization schedules for the current as well as the following year using
a. Straight-line.
b. Double- declining-balance at twice the straight-line rate.
c. Sum-of-the-years’- digits (optional) methods.