Show me the steps to solve this problems in Excel SheetAn oil refinery has inputs from three suppliers, with the prices and characteristics

shown in the table. The inputs are blended to produce two products, with the

promised specifications are shown in the table.

The refinery has a capacity of $960,000$ litres$/$day overall. Subject to the overall

capacity, up to $500,000$ litres$/$day of any input, or $650,000$ litres$/$day of any output

can be handled.

We can assume that all three inputs have identical densities, thereby enabling the

sulphur percentages to be treated as if they were by volume. We can also assume

that there are no losses in the blending process, and that the characteristics of the

outputs are a weighted average $($by volume$)$ of the characteristics of the inputs.