Shares of medical equipment maker Becton, Dickinson and Co. and rival CareFusion both bounced above their 52-week highs Monday before markets opened and a day after the companies announced their $12.2 billion combination. Becton Dickinson said Sunday it will spend $58 per share in cash and stock to buy CareFusion in a deal expected to close in the first half of 2015. That represents a 26 percent premium to CareFusion's closing price of $46.17 on Friday, before the deal was announced.