If 114 people attend a concert and tickets for adults cost $3.5 while tickets for children cost $3 and total receipts for the concert was $377.5, how many of each went to the concert?

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?