A salesperson had 50 shirts to sell and must sell a minimum of 20 shirts. The salesperson sells the shirts for $35 each. The amount of money the salesperson makes for selling x shirts is represented by a function. f(x)=35x

What is the practical range of the function?

All real numbers

all multiple of 35 between 700 and 1750, inclusive

all integers from 20 to 50, inclusive

all multiple of 35 between 0 and 1750, inclusive