Question 1058834
Let t be cans of tuna, and c be cranberry cans. Then:
5t+4c=3681 and
7t+3c=4220
So:
15t+12c=11043
28t+12c=16880
13t=5837
t=449
c=359
Tuna costs $4.49/can; cranberry sauce costs $3.59/can. ☺☺☺☺