Question 9 4 pts Louis Petit, a manager of Doggone Gorgeous, Inc., was reviewing the water bills of a dog daycare and spa. He determined that its highest and lowest bills of $4000 and $2000 were incurred in the months of May and November, respectively. If 600 dogs were washed in May and 200 dogs were washed in November, what was the variable cost per dog wash associated with the company's water bill? (Round any intermediate calculations to the nearest cent and your final answer to the nearest dollar.) $4.00 O $5.50 O $4.50 $5.00