during summer vacation, you charge people $8 per hour for swimming lessons and a $20 registration fee. if you make $52 a day, how many hours did you spend teaching lessons?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?