For a two-factor study with 2 levels of factor A, 2 levels o…

For a two-factor study with 2 levels of factor A, 2 levels of factor B, and a separate sample of 10 participants in each treatment condition, the two means for level A1 are 4 and 1, and the two means for level A2 are 3 and 2.  For these data, what is the SS value for factor A (SSA)?