MEXICO CITY — Grupo Bimbo S.A.B. has sold $800 million of its 4.875% notes due in 2020. The company said the notes constitute senior unsecured obligations and unconditionally will be guaranteed by certain Grupo Bimbo subsidiaries, including Bimbo S.A. de C.V., Barcel S.A. de C.V., Bimbo Bakeries USA, Inc. and Bimbo Foods, Inc. The company said it will use proceeds from the offering to refinance existing indebtedness and for general corporate purposes.