Convert to NZ$: $5,000,000/$.48 = NZ$10,416,667.
Invest the NZ$ at an annualized rate of 6.80% over five days.
NZ$10,416,667 [1 + 6.80% (5/360)]
Convert the NZ$ back to dollars:
NZ$10,426,505 $.50 = $5,213,252
Repay the dollars borrowed. The repayment amount is:
$5,000,000 [1 + 7.5% (5/360)]
After repaying the loan, the remaining dollar profit is:
$5,213,252 − $5,005,208 = $208,044