Karen would now like to forecast sales for january through december of the next year, months 37 through 48, using this decomposition method. which process is the correct one for making this forecast?

a. multiply each month by 1.02, then add 169.499, and then multiply that quantity by that each month's respective seasonal index.
b. multiply each month by 1.02 and then add 169.499.
c. multiply each month by its seasonal index, then add 169.499, and then divide that quantity by 1.02.
d. multiply each month by 1.02, then add 169.499, and then divide that quantity by that each month's respective seasonal index.