A company purchased equipment by 180,000 SR, it is estimated that equipment useful life is equal to 4 years, and salvage value is equal to 80,000 SR. And a tires cost is equal to 20,000 SR and tires useful life is 2 years. It is required to find: 1) Depreciation amount (D) of equipment a long life time; and 2) The Book Value (BV) of equipment a long life time using: A) Straight Line Method (SL); B) Sum Of Year Method (SOY); and C) Double Decline Balance Method (DDB).