Hello everyone
As shown in the figure, assume that the hole size is .344, the datum B size is 22.441, and the datum C size is .99, Is the position of the hole apply to MMC equal to .01(hole)+.01(datum B)+.20(datum C)=.40
Variations in datum feature references do not allow extra variation in the location of the referencing feature relative to the datum reference frame.
Size-related modifiers applied to datum features allow for variation in the datum features to potentially allow the part to shift relative to the datum reference frame in a way to accept the referencing feature(s.)