Model Fit
The ANOVA table provides a breakdown of the sum of squares, a measure of variability in the dependent variable, for this model. The Regression row displays information about the variation accounted for by your model. The Residual row displays information about the variation that is not accounted for by your model. The Uncorrected Total represents the entire variability in the dependent variable, while the Corrected Total is adjusted to only reflect variability about "average" sales.
The Residual sum of squares and Corrected Total are used to compute r2. An r2 value of 0.933 means that the model accounts for about 93.3% of the variability in the dependent variable.