Correct Answer: CTo determine how many filing units should be purchased, we start by calculating the total linear filing inches each 6-shelf unit can hold. Each shelf is 33 linear filing inches, and there are 6 shelves per unit, so one unit can hold 33 inches x 6 shelves = 198 linear inches. Given there are 1,000 records, each 1 inch thick, we need a total of 1,000 linear inches. Dividing the total linear inches needed by the capacity of one unit gives us 1,000 inches / 198 inches = approximately 5.05 units. Since you cannot purchase a fraction of a unit and to ensure all records fit, you will need to round up to 6 units.