A = Single diff (for approval)= 15 points
B = A single diff for approval under 10 mins = 15 points
C = Instrumental, Orchestral, Videogames OST = 13 points *
D = You have 2 or less ranked map = 12 points
A+B+C+D = 15+15+13+12 = 55 points
*C kinda varies because it also appears on a mobile rhythm game so the actual score could go up to 62 but i'll let you decide on that i guess.