First, how many potatoes are there in the 400 pounds that they used?
let's first check how many 5 pound bags those are: 400/5=80. So they're using 80 5-pound-bags.
each of those bags has 20 potatoes, so there are 20*80=1600 potatoes in total.
How many servings of french Fries are those?
there are 2 potatoes in a serving, so 1600/2=800.
so they sold 800 servings of french fries.
now we can ask how much they earned! each serving costs .95, so in total they earned 800*0.95=760
so the answer is that they take in 760 dollars in such a day!