Subject X Y
Tom 9 3
Brad 8 9
Janice 5 2
Jane 5 8
Annie 9 8
Patty 7 6
Sean 3 2
Tom 8 3
Able 5 5
Two scores, X & Y, are provided above. For these scores, find the value of the following expression:

LaTeX: \sum Y

M? aoc=96 ? space, m, angle, a, o, c, equals, 96, degree \qquad m \angle boc = 8x - 67^\circm? boc=8x? 67 ? space, m, angle, b, o, c, equals, 8, x, minus, 67, degree \qquad m \angle aob = 9x - 75^\circm? aob=9x? 75 ? space, m, angle, a, o, b, equals, 9, x, minus, 75, degree find m\angle bocm? bocm, angle, b, o, c: