Need help solving and explaining.

The function x} = 12 + 44x - 384 models the daily prot, in dollars, a shop makes for selling donut combos, where x is the number of combos sold and x] is the amount of prot. Part A: Determine the vertex. What does this calculation mean in the context ofthe problem? (5 points] Part B: Determine the x-intercepts. What do these ValUES mean in the context of the problem? {5 points)