a clear handwriting(make the steps clearly and step by step ) for Process Plant Economics and Management

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 D and the working capital is E percent of the total capital investment. The annual net total product cost amounts to OMR F. If the income tax rates on gross earnings total G percent, determine the following: (a) Percent of total capital investment returned annually as gross earning [10 Marks] (b) Percent of total capital investment returned annually as net profit [10 Marks]