Guys,
After all the items are received by you, I will let you know the final cost on our items, and as I promised, I will return the residual amount to you. As we have pre-calculated the total expense, I believe the difference will be in $5

If some coins, still good right? Then I will ask you PM me your bank detail. I have not thought about if it is more than budget, I guess I will charge more next time.
One more last thing, as strongly recommended by Supplier, can you please keep the price as low as you could. I won’t mention price/expense in public place any more.