Simplify 15r+6(60-r) what are the units associated with the entire expression

So far, there is no units we can see becaus we have no context what this is trying to find

so
use the distributive property which goes like this: a(b+c)=ab+ac
so
first distribute

6(60-r)=6(60)+6(-r)=360-6r

now we have
15r+360-6r=
15r-6r+360=
9r+360
there are no units associated with the expression