100 mg       +        100 mg    +   50 mg     =    250 mg
 10 0 m g         +            1 0 0 mg      +    50  mg     =      2 50 mg
10 m   +     00 mg            50
01 0gm      +        1 0 mg0     + 5 0 m g   =     52 mg0
mg 100 100 mg + 50 mg = + 250 mg
100 + 100 mg 50 =
100 mg BLANK 100 mg + 50 BLANK = 250 mg
100 mg       +        100 mg    +   50 mg     =    250 mg