Final answer:
Brennen spent a total of $67.
Step-by-step explanation:
To calculate the total amount Brennen spent, we need to find the sum of the cost of each item. Each notebook costs $3, so 3 notebooks will cost 3 x $3 = $9. Each box of crayons, colored pencils, and markers costs $29, so 2 boxes of markers will cost 2 x $29 = $58. The new book bag does not have a given price, so we cannot include it in the total cost.
The total amount Brennen spent is $9 + $58 = $67.