Given :
Bill Lindsay is paid 3.75% on his CD sales and music downloads.
Last year : the number of sales = 1.13 million CD's and 2.4 million music downloads.
The cost of 1 CD = $6
The cost of 1 music download = $2
a.) What was the total amount of CD sales?
The total cost of CDs =

So, the cost will be 6.78 million dollar
b.)What was the total amount of downloads?
The total amount = 2.4 * 2 = 4.8 million dollar
c.) How much did Bill receive in royalties last year?
Total amount of CDs and music downloads = 6.78 + 4.8 = 11.58 million dollars
so, Bill will receive 3.75% of the total
so, 3.75% of 11.58 =

So, he will receive = 0.43425* 1000,000 = $434,250