Dylan is comparing prices of yarn for a project. The prices and quantities from four stores are shown.
Store 1
Store 2
Store 3
Store 4
2 yards
10 feet
$2.50
12 feet
$3.40
5 yards
$4.00
$1.85
From which store should Dylan make his purchase if he wants to get the best price per unit?
A. Store 1
B. Store 2
C. Store 3
D. Store 4