Answer:
The cost per fluid ounce is ≈$0.13
Explanation:
We can use proportion to solve this;
Let x be the unit cost per fluid
100 fluid ounce= $12.99
1 fluid once = x
Cross multiply
100x = $12.99
Divide both-side of the equation by 100
100x/100 = $12.99/100
(On the left-hand side of the equation, 100 at the numerator will cancel-out 100 at the denominator leaving us with just x while on the right-hand side of the equation $12.99 will be divided by 100)
x = $0.1299
x≈$0.13
Therefore the cost per fluid ounce is ≈$0.13