An auto supplies company has retail stores located in eight cities in California. The price they charge for a particular product in each city varies because of differing competitive conditions. For instance, the price they charge for a case of a popular brand of motor oil in each city follows. Also shown are the number of cases that the company sold last quarter in each city.

City	Price ($)	Sales (cases)
Bakersfield	34.99	501
Los Angeles	38.99	1,355
Modesto	36.00	214
Oakland	33.59	892
Sacramento	40.99	625
San Diego	38.59	1,148
San Francisco	39.59	1,674
San Jose	37.99	859

Compute the average sales price per case for this product during the last quarter. (Round your answer to two decimal places.)$