A consortium of international telecommunication companies contracted for the purchase and installation of a fiber optic cable linking two major cities at a total cost of US$960 million. This amount includes freight and installation charges estimated at 10% of the above contract price. If the cable shall be depreciated over a period of 15 years with zero salvage value:

a) What is the depreciation charge during the 8th year using the sum-of-the-years digit method. Use the formula and table.