A Retail Store Has Three Departments, A, B, and C $$\begin{array} { l r } \text { Department A } & \$ 356,250 \\\text { Department B } & 641,250 \\\text { Department C } & 427,500\end{array}$$

Essay

A retail store has three departments, A, B, and C, each of which has four full-time employees.The store does general advertising that benefits all departments.Advertising expense totaled $90,000 for the current year, and departmental sales were:
$$\begin{array} { l r } \text { Department A } & \$ 356,250 \\\text { Department B } & 641,250 \\\text { Department C } & 427,500\end{array}$$ How much advertising expense should be allocated to each department?