The raspberries cost 1.53 dollars more than the strawberries per pound.
If the grocery store charges $9.50 for 2 pounds of strawberries, we must divide 9.50 by 2, which equals 4.75.
Comparing 4.75 (the cost of strawberries per pound) to 3.22, (the cost of raspberries per pound), we find that the difference between the two numbers is 1.53z