Overseas income

Hi There,

I recently did a work trip to Australia, where I took $400 cash out from the business account to use incase I needed to use cash overseas.

I ended up using none of that cash and then earning about $1400 cash from the work that I did.

So now I have to deposit the Australian funds into the business account.  But I'm a little confused how to put it back, in particular to the $400 I took out as there will be a less amount going in as the conversion back to nzd will be less.

Hope that makes some sort of sense.