[MUST SHOW WORK] Kal has submitted an application for a music competition and paid a non-refundable application fee of $300. He also purchased a 10-pack of additional music lessons for $500. If he cancels the music lessons, he will get this fee back except for a 20 percent deposit fee. If his application is not accepted, Kal's sunk cost would be Question 27 Select one: A. $500. B. $800. C. $900. D. $400. E. $550