4. A company purchased a piece of equipment for $30,000 on May 1, 2019. Management estimates a salvage value of $4,500, a useful life of four years and estimated production output of 15,000 units. It produced 3,000 units in 2019. Where applicable, it applies the half-year rule. What is depreciation expense for 2020 using the straight line method (rounded to nearest dollar)? a. $3,400 b. $4,250 c. $5,100 d. 86,375 5. A company purchased a piece of equipment for $30,000 on May 1, 2019. Management estimates a salvage value of $4,500, a useful life of four years and estimated production output of 15,000 units. It produced 3,000 units in 2019. Where applicable, it applies the half-year rule. What is depreciation expense for 2019 using the straight line method (rounded to nearest dollar)? a. $3,188 b. $5,100 c. $6,375 d. $7,500