Show complete computations. (Handwritten)

Use continuous computations, round off your final answers to two (2) decimal places.

An equipment costs Php 10,000 with a salvage value of Php 500 at the end of 10 years. Calculate the total depreciation charge and book value at the end of 7 years using: a. straight line method depreciation charge: Php book value: Php b. sinking fund method at 4% interest depreciation charge: Php book value: Php c. declining balance method depreciation charge: Php book value: Php d. double declining balance method depreciation charge: Php book value: Php e. sum of the year's digit method depreciation charge: Php book value: Php