Solve x1/6+3/4=1/4 i have to add 20 characters

What is the range for 31,39,29,34,37,24,36,33,34,28

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?

How is this equation completed? i cannot find any examples in the book.