sandy bought 65 books for $ 1080 from one shop and 55 books for $ 840 from another shop . what is the average price that sandy paid per book ?
n0 = 65.0
n1 = 1080.0
n2 = 55.0
n3 = 840.0
t0 = n1 + n3
t1 = n0 + n2
answer = t0 / t1
print(answer)