The Following Table Illustrates the Value Added in the Production

Essay

The following table illustrates the value added in the production of a litre of petrol by each stage of production.(The values are hypothetical,and there are no excise taxes or sales taxes.)
$\begin{array}{|l|c|l|}\hline \text { Stage of } & & \\\text { Production } & \text { Value of Sales (\$) } & \text { Value Added (\$) } \\\hline \text { Oil drilling } & 0.60 & \\\hline \text { Refining } & 1.10 & \\\hline \text { Shipping } & 1.35 & \\\hline \text { Retail sales } & 1.45 & \\\hline\end{array}$ a.What is the value added by each stage of production?
b.What is the total value added?
For simplicity,you can ignore the cost of the inputs for oil drilling.
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