Payments are processed with the payment gateway using settings that are defined in the payment profile.
In this example, the balance will be calculated by the user choosing which shirt he/she would like to purchase, multiply by the number of shirts, and then add a $5 handling charge. Each shirt type has a different price and those prices are indicated in the Dbl Value column on the Options tab of the question. The balance is then calculated using Site Administrators > Balance Calculator. In situations where a collection grid should be used for calculation, the collection grids are evaluated first and then are included in the final balance.
Which T-Shirt would you like to buy?
Number of shirts(We used the integer validation on the Settings tab)