Dr$.$ Gupta Diagnostics' income statement for $2015$ is as follows:

a$.$ Compute the profit margin in $2015.$

b$.$ Assume in $2016$ sales increase by $10$ percent and cost of goods sold increases by $20$ percent. The firm is able to keep all other expenses the same. Once again,

assume a tax rate of $30$ percent. What are the income after taxes and profit margin in $2016?$