The DDB function on is the ONLY one I need PLEASE use excel format, and use the accounts I have given below thanks

Using Excel to prepare depreciation schedules The Fraser River Company has purchased a new piece of factory equipment on January 1, 2018, and wishes to compare three depreciation methods: straight-line, double-declining-balance, and units-of-production. The equipment costs $400,000 and has an estimated useful life of four years, or 8,000 machine hours. After four years, the equipment will have a residual value of $20,000. Requirements Use Excel to prepare depreciation schedules for straight-line, double-declining-balance, and units-of- production methods. Prepare a second depreciation schedule for double-declining-balance method, using the Excel function DDB. The DDB function cannot be used in the last year of the asset's useful life. At December 31, 2018, Fraser River is trying to determine if it should sell the factory equipment. Fraser River will only sell the factory equipment if the company earns a gain of at least $6,000. For each of the depreciation methods, what is the minimum amount that Fraser River will sell the factory equipment for in order to have a gain of $6,000