Confirm the entry by clicking on the check mark in the entry bar. The result of the calculation should appear in cell B12. A faster way to create the same formula is to click on each cell in the formula. Try that to create a formula in C12. Click on cell C5 and then C6, et cetera.
Functions are shortcuts for creating formulas.
Click in the entry bar to confirm the entry. If the same formula is required in other cells, formulas can be copied and pasted. A more powerful way of repeating formulas in adjacent cells is to use the Fill Right command. Highlight cells from D12 to I12. Choose Fill Right in the Calculate menu.