Answer:
The number of sandwiches sold is 73. This is because it is multiplied by the expression for the money received per sandwich.
The cost to make each sandwich is S. This is stated in the first sentence of the problem.
The profit is 0.2S. This is because they sell each sandwich for an additional 20% of the cost ( S )
The amount of money the band receives is (S + 0.2S ). This is because it is the price per sandwich.
