MC(R) = [1,2]

 MB(R) = [20,30]

 A(R,R) = 
[[20,30]
 [40,60]]

 A(R,R) = 
[[40,70]
 [70,120]]

 A(R,R) = 
[[20,40]
 [30,60]]

 full A
[[0,0,0,0,0]
 [0,20,40,0,0]
 [0,30,60,0,0]
 [0,0,0,0,0]
 [0,0,0,0,0]]

 MB, MC, dot [10,20,30,40,50][0,1,2,3,4]400
 MC, MC, dot [10,20,30,40,50][0,1,2,3,4]30