Zulu Company had the following income statement for last year:

Sales $4,000,000

Less: Cost of goods sold 2,200,000

Gross profit 1,800,000

Less: Selling and administrative expenses 1,080,000

Operating income $ 720,000

The company's assets are shown below:

December 2021 December 2022 Cash $85,000 $91,000 Accounts Receivables $635,000 $565,000 Inventories $356,000 $442,000 Investments in Zena Company $300,000 $300,000 Plant and Equipment - Net $985,000 $865,000 Building rented to Alpha Company $450,000 $450,000 Land for Future Use $200,000 $300,000

Required: (Show the formulas used in each calculation and Carry computations to three decimal places).

A. Calculate the average operating assets.

B. Calculate the margin.

C. Calculate the turnover.

D. Calculate the ROI.