Changes in earnings and sales indicate shifts in a company's ROCE.
A higher ROCE is generally representative of successful growth of a company and is a sign of higher earnings per share in the future.
Keep in mind, while ROCE is a good measure of a company's recent performance, it is not a highly reliable predictor of a company's earnings or sales in the near future.
If the company is generating high profits with its current level of capital, some of that money can be reinvested in more capital which will generally lead to higher returns and earnings per share growth.
A relatively high ROCE shows Target is potentially operating at a higher level of efficiency than other companies in its industry.