Answer:
$19.02
Step-by-step explanation:
Paying a total of $13.15 for berries after a $3 coupon means that the coupon amount was already deducted, and she still owed $13.15.
She paid $13.15 and $7.83.
The total she paid was
$13.15 + $7.83 = $20.98
She paid with 2 $20 bills.
She paid 2 * $20 = $40
The change is $40 - $20.98 = $19.02
Answer: $19.02