Bob Foster,
They have four price range:
1.) Initial Task: Standard rate for customers. The highest price. This includes your overhead cost per hour, net profit,set up/breakdown/prep cost/trip charge. As cc, it can be broken down to cost per sq. ft. I would use this for first time customers.
2.) Initial Task: Service agreement customers. The second highest price. Multiply #1 (standard rate) for service agreement customers (in our case, past customers) by .85%.
3.) Add on: Standard rate for customers. You add this to your initial task (#2).
4.) Add on:Service agreement customers. Discount 15% lower than the add on for standard customers (#3). Add to the initial service agreement customers. I would use this for past customers.
Thats how they do it .
Bob Rock