Question 1151886
75 has multiples that end in 5 and 0, so half of the 75 can be a multiple of 90, which has only multiples that end in 0
13*75=965, which cannot be a multiple of both, so there are only 12 multiples of 75 that can possibly work and half of them end in 5, so that leaves 6 that end in 0.

150
300
450
600
750
900

90 divides evenly into 450 and 900.

Two customers.