(a) Your answer is correct. Assume that Whispering completed the office and warehouse building on December 31, 2017, as planned at a total cost of $5,207,200, and the weighted average amount of accumulated expenditures was $3,811,300. Compute the avoidable interest on this project. (Use interest rates rounded to 2 decimal places, e.g. 7.58% for computational purposes and round final answers to 0 decimal places, e.g. 5,275.) Avoidable Interest 428,2071 (b) Compute the depreciation expense for the year ended December 31, 2018. Whispering elected to depreciate the building on a straight-line basis and determined that the asset has a useful life of 30 years and a salvage value of $301,200. (Round answer to 0 decimal places, e.g. 5,275.) Depreciation Expense $