How Do I Add Up Numbers

D

David J

I have a business that uses VIP barcodes for repeat customers. How can I
create a feild to be able to enter a number and have it add up to what they
already have banked in a field on the forms screen after we have scaned their
barcode. I have gotten as far as getting the forms together. I dont think I
am understanding access too well on how to do this. Please help. Thanks to
all ahead of time

I am using access 2003
 
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