Discount retailer Dollar General Corp said it agreed to be acquired Monday by investment firm Kohlberg Kravis Roberts & Co in a 7.3-billion-dollar buyout, according to dpa. Dollar General has 8,260 stores around the United States - the most of any retailer in the country. Shareholders of the Goodlettsville, Tennessee-based company will receive 22 dollars per share - 31 per cent above Dollar General's Friday closing price. The shareholders, and federal regulators must still approve the acquisition. KKR will take on about 380 million dollars in debt as part of the deal.