"An on-line electronics store must sell at least $5000 worth of computers and printers per day"
The bold faced words tell us greater than or equal to 5000
"The store can ship a maximum of 20 items per day"
The bold faced words tell us less than or equal to 20
We can automatically eliminate A and B since they don't have EQUAL sign in them. From C and D, we choose D because it correctly attaches the price of printers and computers to the respective variables (printers is p & computers is q). Choice C does this wrong!
ANSWER: D