Please Help!! in the figure below, ∆abc ∆def. point c is the point of intersection between ag and bf, while point E is the point of intersection between dg and bf. Prove ∆abc ~ ∆gec.

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?