Framework Company Provides Architectural Services Requirements:
A)Calculate the Contribution Margin,contribution Margin Ratio,and Operating Income

Framework Company provides architectural services.The company provides the following financial data:
$\begin{array}{ll}\text { Service Revenue } & \$ 30,000 \\\text { Salaries and Other Variable Costs } & 20,350 \\\text { Rent Expense } & 4,500 \\\text { Depreciation Expense } & 500\end{array}$ Requirements:
a)Calculate the contribution margin,contribution margin ratio,and operating income.
b)Framework provided service to 150 customers during the month.Determine the average amount the company charged each customer.