Can someone explain to me what’s going on here? i’m really confused and i need this is due by tonight, explain this multi step question for me and how you got your i’d really appreciate it!

Here's an example of a piecewise function that has three parts, where your choice of parts depends upon the input, x.  If you order 57 shirts, you must use the "14x + 20" part of this function, because 57>50.  Subst. 57 for x in "14x+20."  You'll get 14*57 + 20, or $818.

What's the total cost of ordering 17 shirts?  Note that 17 lies in the interval 0≤x<25.  Therefore you use ONLY the "17x+20" part of the function:

17(17)+ 20 = $309.

32 shirts:  32 is in the second interval, so evaluate "15.80x+20."
We get:  15.80(32)+20 = $525.60 (answer)