Hello everyone. couple of months ago i took a retainer of $1,000 from a client to do Private Investigation work. Today we closed the case and their bill is approximately $1,400.00 I need to send them an itemized invoice to reflect total charges, time, mileage etc., But how do i credit them the 1,000 retainer within in that invoice, all of the lines seem to want to add, not deduct?
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