Unit test Part 2

29.     Cost per yard x total yards purchased  = Total cost

So.....    3.87  x 5.50   ≈  $ 21.29

28.     {28, 61, 63, 65, 66, 67, 68, 69, 82, 86, 87}

The outlier appears to be 28

Mean with outlier  =   742 / 11  ≈  67.45

Without outlier  = 714 / 10  = 71.4