The Centennial Chemical Corporation announced that, for the period ending March 31, 2017, it had earned income after taxes of $2,768,028.25 on revenues of $13,144,680. The company's costs (excluding depreciation and amortization) amounted to 61 percent of sales, and it had interest expenses of $392,168. What is the firm's depreciation and amortization expense if its average tax rate is 34 percent?

Please be as detail as positive on how the calculation is done i really want to learn.