Mrs. Moore's third grade class wants to go on a field trip to the science museum.
-The cost of the trip is $245.
-They currently have $180 in their class field trip fund.
-The students can earn $15 each week if they run the store.
A) How much more money does the third grade class still need to earn to pay for their trip?
B) How many weeks will it take them to earn the money they need?