An industrial laser can be purchased and installed for $90,000$. Assume that the GDS recovery rate is given for the 7-year period. We expect that the laser stays in service for eight years, and we gain $10,000$ from the disposal of it at the end of year eight. The $11,340$ net annual value that can be attributed to this laser is constant over all the eight years. Assume that the effective income tax rate is $0.46$ and the after-tax MARR equals $15%$ per year. What is the ATCF at the end of year six? Consider the depreciation deduction based on the 7-year period GDS recovery rate