Revenues and profit per share at Caterpillar increased the first quarter of this year. The company is reporting a 23-percent increase in sales and revenues. Profit per share was up 29-percent to $2.37 per share. The company attributes the first quarter results to strong replacement demand for products in the U.S. strong global demand for mining products, and a continued focus on cost management. Cat is increasing its profit per share outlook for 2012 by a quarter, but is maintaining the sales and revenues outlook. Company officials say sales and revenues are slowing in China and Brazil, but growth is anticipated to be better than expected in North America.