The Spartans are planning a field trip. The trip costs $5 for each student ticket and a flat fee of $100 for the buses (no matter how many buses are used). Which expression would help the teachers find the total cost if n amount of students are invited to the field trip. *

A. 5 + n(100)
B. 5n + 100
C. 5(100) + n
D. n + 5n