Is 'As a result, product proliferation represents a shift in the curve relating sales volume and variability (see Figure 7.4).' an autonomous statement, not logically connected to 'Product proliferation has no effect on the curve relating to sales volume and variability.'
As a result, product proliferation represents a shift in the curve relating sales volume and variability (see Figure 7.4).###Product proliferation has no effect on the curve relating to sales volume and variability.