Steps for...

In cell B$14,$ create a formula without using a function that adds $1$ to the value in cell B$12$ and then multiplies the result by the value in cell B$13.$ In this formula, use a mixed reference for cell B$12$ by including an absolute reference to row $12.$ Copy the formula from cell B$14$ to the range B$15$:B$17$ and then copy the formulas from the range B$14817$ to the range C$14$:H$17.$