Please show the excel sheet using excel solver and clarify DV, OF & constraints

A paper company produces paper rolls with a standard width of 20 feet each. Special customer orders with different widths are produced by slitting the standard rolls. In practice, an order is filled by setting the slitting knives to the desired widths. Three orders are received to be fulfilled as summarized in the table below. Usually, there are number of ways in which a standard roll can be slit to fill a given order. Formulate a mathematical model to minimize the total trim loss. No need to solve the model for this problem.

Order	Desired Width (ft)	Desired # of Rolls
1	5	150
2	7	200
3	9	300

Hint: first find the knife setting combination that will fill the required orders in order to minimize the total trim loss given that a promising setting does not produce a trim-loss roll of 5 feet or larger then formulate the model.