Walgreen reports January SSS up 3.7%, reports January sales $6.15B Total front-end sales increased 1.3% compared with the same month in fiscal 2012, while comparable store front-end sales decreased 0.4%. Customer traffic in comparable stores decreased 2.8% while basket size increased 2.4%. The company said the percentage of Express Scripts customers filling prescriptions in its pharmacies continued to increase in January. January pharmacy sales increased by 8.7%, while comparable store pharmacy sales increased 6.2%. Sales in comparable stores increased by 3.7% in January.