Question $2$

You have decided to award a $10\%$ discount to a valuable customer and in D$2$ you want to calculate the discount amount that will appear on their monthly invoices. You have typed $10\%$ into A$2,$ and you know that if you multiply the monthly total in C$2$ by A$2,$ Excel will work out the $10$ percent. You also want to be able to use the Autofill feature to copy this formula for the other three months. Which formula below would work out the correct result for you?