The sum of two numbers is 20. When the second number is subtracted from the first number, the difference is 4. Find the two numbers. What are the two numbers?​

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?