i am not good at math so plz help

Answer:
Equation is: 2,250 - (420+325+275) = A.
The A is 1,230
Step-by-step explanation:
The step by step is the 2,250 - (420+325+275). So start with 420+325+275= 1,020. Then the 2,250 - 1,020 = 1,230.
I am highly positive about this.
Your welcome. ;)