help please explain why I am wrong!

Banko Inc. manufactures sporting goods. The following information applies to a machine purchased on January 1, Year 1: Purchase price $ 75,809 Delivery cost 3,808 Installation charge 2,208 Estimated life 5 years Estimated units 154,208 Salvage estimate $ 3,209 During Year 1, the machine produced 50,000 units and during Year 2, it produced 52,000 units. Required Determine the amount of depreciation expense for Year 1 and Year 2 using each of the following methods: X Answer is complete but not entirely correct. Year 1 Year 2 a. Straight-line $ 15,000 X 3 15,000 X) . Double-declining- balance S 48,000 X 28.800 (X C. Units of production $ 24.000 X 3 24.980 X