Calvin, Inc., reported net income of $$250,000$ on sales of $$5,000,000$ and declared dividends of $$75,000.$

Calvin was able to achieve these results with assets of $$20,000,000$ financed with $$15,000,000$ of total debt.

Determine the following:

a$.$ Calvin's profit margin.

b$.$ Calvin's equity multiplier.

c$.$ Calvin's internal growth rate.

d$.$ Calvin's sustainable growth rate.

e$.$ Calvin's total asset turnover.