Does iTunes credit work for gold?

[Idiosyncrasy]

I have some iTunes credit that I am considering spending on gold, but I am just wondering if the in-app purchase looks at credit before charging to a card. I made an in-app purchase in another app once that just charged my card and bypassed the credit, so I just want to make sure. Thanks in advance.

[Luke 3457]

It will use your I tunes balance first before charging your card