Cost Behavior Problem of rich mahogany and leather$-$bound books. The firm produces these lamps uaing a tome of assembly line workers. Among other costs, the firm has the following costs:

$\backslash$table$[[$Sales in Units,Januany,Februan,March,April,May,Juns$],[$dvertising Expense,$2,217,3,224,8,243,4,179,$$$,279,7,498],[$Packing Expense,$$8,019,$$$8,019,$$$8,019,$$$8,019,$$$8,019,$$$8,019$