Price of a Sandwich=
$0.90
+$1.90
_______
$2.80c
_______
2.80 ➗ 2
= $1.40c
( you add the two prices and divide by two to find the middle number or the number between which is what they would sell one sandwich at)
Number of Sandwiches Sold In that Day=
$27.71 ➗ $1.40
= 19.79
( However you cannot sell 19.79 of a sand which so I'd say you keep it at 19 sandwiches)
ANS = 19 sandwiches sold
