7. ABC Company finds that its utility costs increase as its production goes up, but the costs also include a baseline amount that doesn't vary with production. The following information is gathered Month January February March April May June Production UnitsUtility Costs 390 301 500 490 470 240 $4,578 $4,352 $4,936 $5,098 $4,611 $4,048 Using the High-low method and the information above, what is the variable cost of utilities per production unit being used in the factory, rounded to the nearest penny? A. $4.35 B. $10.36 C. $11.59 D. $12.47