Notice that the 2nd, 3rd, and 4th blanks have this relationship.

list price

-

discount

=

selling price

There are two sets of numbers that could fit.

	$20 - $7.90 = $12.10
and	$16 - $4.80 = $11.20

The discount must be 30%, because $4.80 = 30% of $16.

Discount Daisy's sells books for    30   % off their list price. "Half Magic" lists for $   16    . At Discount Daisy's the price of this book is $  4.80   less than the list price, so it sells for $  11.20  . Marvin gives the clerk $   20    to pay for one copy of "Half Magic." The book costs $  12.10   with tax, so Marvin gets $   7.90   in change.