Hello, I'm building a structure for a fee schedule for a construction business. let's say that the client is paying for roof. THen, the way they charge is: they charge $7.00 for the first 1000 feet and 5.00 for the rest. With this in mind, I created 4 columns: Base Fee, Base Units, Variable Fee and Variable Unit and I entered the values: 7.00 for base fee, 1000 for base amount, 5.00 for variable fee and 1 for variabe units (you know, the normal financial formula for this). However, now the user came with some moe clarification and it's more complex. For example, it could be 7.00 for the first 1000 feet, $5.00 for 1001-999 feet and $3.00 for the rest. Now I'm frozen and don't have a clue on what to do. Please help!!!