Champion Contractors completed the following transactions and events involving the purchase and operation of equipment in its business. Paid $287,600 cash plus $11,500 in sales tax and $1,500 in transportation (FOB shipping point) for a new loader. The loader is estimated to have a four-year life and a $20,600 salvage value. Loader costs are recorded in the Equipment account. Paid $4,800 to enclose the cab and install air-conditioning in the loader to enable operations under harsher conditions. This increased the estimated salvage value of the loader by another $1,400. Recorded annual straight-line depreciation on the loader. Paid $5,400 to overhaul the loader's engine, which increased the loader's estimated useful life by two years. Paid $820 to repair the loader after the operator backed it into a tree. Recorded annual straight-line depreciation on the loader. Prepare journal entries to record these transactions and events