. r2 , previously located in santa clara , california , develops and sells computer-aided detection technology and products ( 201ccad 201d ) , an innovative technology that assists radiologists in the early detection of breast cancer . the aggregate purchase price for r2 of approximately $ 220600 consisted of approximately 8800 shares of hologic common stock valued at $ 205500 , cash paid of $ 6900 , debt assumed of $ 5700 and approximately $ 2500 for acquisition related fees and expenses