Mariya charged three purchases on her credit card. The charges were $19.53, $12.99, and $26.90. She estimated to total by adding $20, $13 and $27. Without performing the addition, explain how you know whether the actual total is greater than or less than her estimate.​

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?