I use the Purchase module and Payment module on expenses on my Visa statement.

6 months ago I had to go overseas, in order to cover any unexpected expenses during my trip I transferred $4,500 from my bank account to Visa. The monthly statement came and the balance was $3,000, so I'd cover it with an extra $1,500.In the payment module I reconciled the $3,000, but it wouldn't let me enter the extra $1,500. How should I enter these tarnsactions? Thanks.