The correct calculation is:
\[ 32.95 + (-3.50) = 32.95 - 3.50 = 29.45 \]
The interpretation of this sum is:
$29.45 is the amount Bryce has left from his earnings last weekend after purchasing the birthday card.
So the response would be:
32.95 + (−3.50) = 29.45. $29.45 is the amount Bryce has left from his earnings last weekend after purchasing the birthday card.