hi i have the andwer to this but im just wondering how i can caluclate it

Carney Construction purchased a truck for $55,000 on January 1, 2015. The truck had an estimated useful life of 5 years and an estimated residual value of $5,000. Using the double-declining balance method, what amount of depreciation would be recorded in 2016? $13,200 $20.000 $22,000 535,200