Answer:
He earned $15.20. Just multiply the 2.00x4 and the 2.40x3 thats if he picked strawberries for an hour and blueberries for 45 minuets. But since all your question asks is how much he makes in 15 minutes well he made $2.00 picking strawberries and $2.40 picking blueberries
Step-by-step explanation:
so he made $4.40 if no other info is given like time he spent picking theme.