Question 24
The check for a luncheon of $3$ sandwiches, $7$ cups of coffee and one piece of pie came to $\$3.15.$ The check for a luncheon consisting of $4$ sandwiches, $10$ cups of coffee and one piece of pie came to $\$4.20$ at the same place. The cost of a luncheon consisting of one sandwich, one cup of coffee and one piece of pie at the same place will come to