Final answer:
Jason bought a total of 2.5 pounds of berries.
Step-by-step explanation:
To find the total pounds of berries Jason bought, we need to calculate the pounds of blueberries and raspberries he purchased separately and then add them together. Jason spent $3.50 on blueberries and $6.50 on raspberries, and each type of berry costs $4 per pound. So, the number of pounds of blueberries he bought is $3.50 divided by $4 per pound, which is 0.875 pounds. Similarly, the number of pounds of raspberries he bought is $6.50 divided by $4 per pound, which is 1.625 pounds. Adding these together, the total pounds of berries Jason bought is 0.875 + 1.625, which equals 2.5 pounds.