Only Rollup If

Most calculations will have a parameter named Only Rollup If. You can edit this parameter to have any condition you need that specifies whether you want the calculation value to apply. For instance, let's say you had a calculation that calculates the total price. You could edit the Only Rollup If parameter to specify that you only want the total price to apply if the customer has paid on time. Once you set the condition, then the total price will only have a value if the condition is met.