Firm X purchased a piece of equipment exactly 8 years ago. The piece of equipment had a purchase price of $7,458,879, a salvage value of $405,628, and an estimated useful life of 21 years. What is the current book value of this piece of equipment owned by Firm X ? (Round your answer to the nearest whole dollar and record without a dollar sign or a comma. For example, record $34,253.85431 as 34254)