Rocky bought a used car four years ago for $4,590.00 cash (Rocky did not take out a car loan). Currently the car is valued at &2,227.00. This year Rocky drove his car 9,999 miles. He paid $977.12 for his annual insurance and $101.00 for the car's registration. Annual variable costs this year included $1,449.13 for gas, $38.19 for oil and filters, and $440.64 for a brake repair. Calculate the car's depreciation and this year's cost per mile.