how do I calculate this?

Cunningham Performance Auto, Inc. modifies 300 autos per year. The manager, Peter Cunningham, is interested in obtaining a measure of overall performance. He has asked you to provide him with a multi-factor measure of last year's performance as a benchmark for future comparison. You have assembled the following data. Resource inputs were: labor, 8 hours; 290 suspension and engine modification kits; and energy, 90 kilowatt-hours. Average labor cost last year was $20 per hour, kits cost $8 each, and energy costs were $5 per kilowatt-hour. What do you tell Mr. Cunningham? (Specify as a number with at least three decimal digits.)