Peter bought a stereo for $252.49 and some speakers for $117.96. What was the total cost of his purchase?

The total cost would be $ (252.49 + 117.96) = $370.45

370.45

Step-by-step explanation:

Just add these two up.

You can first do the cents, and act as you are adding them up as dollars.

.96+.49=1.45

Now, you can add 252 and 117, then add the cents into it.

252+117=369

370.45