How do I solve this?

On July 1. year 1, ABC. Ltd. purchased a piece of equipment for $ 420000 plus installation costs of $ 30000 that were necessary to male the equipment operational. ABC. Ltd. has a December 31. fiscal year end and uses the straight line depreciation method. The piece of equipment is expected to have a useful life of 10 years at which time it will have a residual value of $ 30000. 1tlii'hat is the book value of the equipment as of December 31. year 3. Round your answer to the nearest dollar