Using the owner's equity information below, calculate the return on investment for the companies in Exercises 2528.
Company  Net Sales  Cost of Goods Sold  GrossProfit  OperatingExpenses  Net Profit  Gross Profit Margin (%)  Net Profit Margin (%) 
25. Plant World 

$414,000  $226,000  $112,600  $113,400  35.3  17.7 
26. Timberline Marble  $743,500  $489,560  _____  $175,410  _____  _____  _____ 
27. Sundance Plumbing  $324,100  $174,690  _____  $99,200  _____  _____  _____ 
28. Dynamic Optical  $316,735  $203,655  _____  $85,921  _____  _____  _____ 
Owner’s Equity Return on Investment (%)
32.  Dynamic Optical  $397,000 
To calculate: The return on investment of the company Dynamic optical which has owner’s equity of
Given Information:
The company Dynamic optical has ownerâ€™s equity of
Formula used:
The return on investment is calculated as:
Calculation:
Consider that net sales are
Compute the gross profit:
Substitute
Hence, gross profit is
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