Analysis of growth, price-recovery, and productivity components (continuation of 13-27). Suppose that during 2011 the market for implementing sales-management software increases by 5%. Assume that any decrease in selling price and any increase in market share more than 5% are the result of strategic choices by Westlake‘s management to implement its strategy.

Required

Calculate how much of the change in operating income from 2010 to 2011 is due to the industry-market-size factor, product differentiation, and cost leadership. How successful has Westlake been in implementing its strategy? Explain.