With online shopping growing, FedEx is bracing for a record volumes this holiday season. The delivery company predicted Monday that shipments from Black Friday through Christmas Eve will rise 12.4 percent over last year to 317 million pieces. FedEx says the busiest shipping days will be the Monday after Thanksgiving and the first two Mondays in December. The company says that to handle the crush, it's hiring more than 55,000 seasonal workers and investing in automation and expansion.