Answer:
Tara bought a total of 160 treats.
Step-by-step explanation:
We are given the following in the question:
Number of boxes of dog treats = 3
Number of treats in each dog box = 40
Total number of treats in dog box =

Number of boxes of cat treats = 2
Number of treats in each cat box = 20
Total number of treats in cat box =

Total number of treats Tara brought =
Total number of treats in dog box + Total number of treats in cat box

Thus, Tara bought a total of 160 treats.