You go to Chick-fil-A. You have exactly $15.02 and you want to spend it all. You love their chicken sandwiches and their nuggets. Based on experience, you know that your family can eat a combination of 7 items (a combination of sandwiches and boxes of nuggets). The chicken sandwich cost $0.98, while the nuggets cost $0.98. How many chicken sandwiches and how many boxes of nuggets can you buy? (Disregard the issue of sales tax in this problem)

Write a system of equations for this problem. Let S represent the chicken sandwich and N represent the number of boxes of nuggets you can buy.