What is the after-tax present worth of a chip placer if it costs $55 000 and saves $17 000 per year? After-tax interest is 10 percent. Assume the device will be sold for a $1000 salvage value at the end of its six-year life. The CCA rate is 20 percent and the corporate income tax rate is 54 percent. final answer= -$1683 (dont use execel)