LAKE FOREST, Ill. (AP) _ W.W. Grainger Inc. (GWW) on Thursday reported first-quarter earnings of $363 million.On a per-share basis, the Lake Forest, Illinois-based company said it had net income of $7.07. The results exceeded Wall Street expectations. The average estimate of seven analysts surveyed by Zacks Investment Research was for earnings of $6.16 per share. The seller of maintenance and other supplies posted revenue of $3.65 billion in the period, also exceeding Street forecasts. Six analysts surveyed by Zacks expected $3.