$2.13
Explanation:
For one batch of fried rice you need 3 pound of rice, so to know the price per batch we need to know how much 3 pounds of rice cost.
The information we have is
Price Pounds
$0.71 ⇒ 1
x ⇒ 3
the x is the cost of 3 pound of rice, which we find by multiplying $0.71 by 3:
x = ($0.71)(3)= $2.13
The cost of 3 pounds of rice is $2.13, so this is how much the cost in rice for one batch of fried rice is.