Demand for rug-cleaning machines at Clyde's U-Rent-It is shown in the following table. Machines are rented by the day only Profit on the rug cleaners is $18 per day. Clyde has 3 rug-cleaning machines. Demand Frequency .30 .20 .20 .15 .10 .05 1.00 3 a. Assuming that Clyde's stocking decision is optimal, what is the implied range of excess cost per machine? (Enter smaller value in first box and larger value in second box. Do not round intermediate calculations. Round your answers to 2 decimal places. Omit the "$" sign in your response.) Implied range of excess cost per machine from $to $