Purchased a used heavy duty truck for $83,500 on January, 2016, It was repaired at a cost of $3,420 and installed on a new platform costing $1,080. The useful life will be 6 years, Residual value is $14,800 on Sep30, 2021, it was retired: 1) sold it for 15,000 2) sold it for $19,500 Please prepare all the calculation and related entries