Answer:
About 1.5
Step-by-step explanation:
We can round 4/5 to 1.
We can round 3/8 to 4/8 = 1/2.
So our estimate is
4/5 + 3/8 =
about 1 + 1/2 = 1.5
(Shh... let's check using the calculator... it's 1.2. We were pretty close!)
321x.07 (7%) = 22.47
$22.47 tax was collected, add that to 321 to find the total. :)