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A rough rule of thumb for the chemical industry is that OMR 1 of annual sales required OMR 2 of fixed capital investment. In a chemical processing plant where this rule applies, the total capital investment is OMR 3200000 and the working capital is 18% of the total capital investment. The annual net total product cost amounts to 1500000 OMR. If the income tax rates on gross earnings total 21%, determine the following:

(a) Percent of total capital investment returned annually as gross earning.

(b) Percent of total capital investment returned annually as net profit.