Answer:
E. $63,401
Explanation:
gain on disposal = salvage value of plant - book value on date of sale
              = $5,790 - $4,820
              = $970
tax on disposal = $970*35%
             = $339.50
after tax salvage value = $5,790 - $339.50
                    = $5,450.50
total cash flow in 4 years
= annual operating cash flow + net working capital + after tax salvage value
= $53,500 + $4,450 + $5,450.50
= $63,401
Therefore, The Year 4 cash flow is $63,401.