Students working part-time at the Gabba walk around the stands selling hot dogs and meat pies on commission. They know that the weather affects the value of sales. On a cold night, they can make $948 in sales, while on a cool night they can make $742 in sales. On a mild night they can make $648 in sales.
If the probabilities for the first two scenarios are 0.19 and 0.37 respectively, then find the average value of sales in dollars. (two decimal places)