Math help on these questions

1.) If a sports shop sold 1,500 dozen golf balls last week, how many individual golf balls did the shop sell?
A. 18,000
B. 180
C. 12,500
D. 125

2.)The Patels took out a 15-year mortgage. How many monthly payments will they have to make on this mortgage?
A. 60
B. 180
C. 90
D. 360

3.)A shoemaker bought 30 pairs of heels. How many individual heels did the shoemaker buy?
A. 15
B. 60
C. 120
D. 30

4.)A merchant bought 30 dozen pairs of gloves. How many individual gloves did the merchant buy?
A. 300
B. 420
C. 360
D. 720

I will give you hints instead of actually doing the work.

1) 1 dozen = 12 So, 1,500 * 12 = (number of individual golf balls)

2) There are 12 months in 1 year. So, 15 * 12 = (number of monthly payments)

3) 1 pair = 2 So, 30 * 2 = (number of individual heels)

4) Dozen pairs = 12 * 2 = 24 So, 30 * 24 = (number of individual gloves)

1500(12)
18000; A.

15*12
60; A.

30(2)
60; B.

30(12)
360; C.

A 1500x12=18000
A 15x12 = 60
B 30x2= 60
D 30x2x12= 720

your welcome