Answer:
$4 million in new debt at 10% annual coupon
500,000 shares x $18.10
new year's expected dividend = $0.48
taxes will decrease by $160,000
Compuvac will need to pay $4,000,000 x 10% = $400,000 in interests for the bonds that it plans to issue new year. That is why their taxes will decrease by $160,000 = total debt payments x tax rate = $400,000 x 40%
It will also need to pay $0.48 x 500,000 shares = $240,000 in additional dividends.
The increase in additional funds needed (AFN) = total interest paid for the bonds - less taxes + additional dividends = $400,000 - $160,000 + $240,000 = $480,000