Answer:
$64,704
Explanation:
Year 4 cash flow = operating cash flow + non operating cash flow
non operating cash flow = salvage value + net working capital - tax(Salvage value - book value)
$5,820 + $4,500 - 0.4($5,820 - $4,860) = $10,704
$10,704 + $54,000 = $64,704