Forward Contracts Arbitrage

When a given forward rate is less than that implied by interest rate parity, the price currency is considered overvalued. Thus we borrow the base currency, invest it at the price currency interest rate, and convert it back to the base currency by selling the futures contract.

How would we manipulate an arbitrage opportunity if a forward rate is more than that implied by IRP, i.e. when the price currency is undervalued?

Borrow the price currency, invest it in the base currency, then convert it back with the futures contract.

Remember that the price currency in A/B is the base currency in B/A, and that an undervalued price currency is the same as an overvalued base currency. Just do everything backward.