i assume you are referring to this code:
<% 'WA eCart Validation
if ((WA_eCart_FormatNumber(WA_eCart_DisplayInfo(spCAR T, "Price") - ((WA_eCart_DisplayInfo(spCART, "Price")/WA_eCart_TotalColumn(spCART, "TotalPrice")) * WA_eCart_GetDiscounts(spCART)), false, 2) > 0)) then
%>
it's a check to make sure that the price and total price are valid.