Potus Company purchased an equipment on 1 January 2015 for 220,000 OMR. As of the conditions on that date, the company engineers estimated the useful life as 15 years and the valuers estimated the residual value as 20,000 OMR. At the beginning of 2021, some new conditions arised in the market and the company management had to revise the estimates for both useful life and residual value. They updated remaining useful life as 9 years and they concluded that the equipment will not have any residual value at the end of its useful life. What will be the depreciation charge for 2021? (assuming straightline method) (You can round the result) Select one: O a. 10,000 Ob. 20,000 O c. 17,143 O d. 15,556