Given that rates of the ingredients, the cost per unit of each ingredients can be calculated as follows,
Given the composition of each taco as, 1 tortilla, 0.25 pounds of beef, 0.125 pounds of beans, 0.0625 pounds of cheese, 1 ounce of Salsa.
Then the cost of taco (C) is calculated as the sum of the product of each ingredient per unit and number of units of that ingredient requires for 1 taco,
Thus, the cost of each taco is $1.17285 approximately.