Rite Aid ( RAD) shares slipped early Tuesday after the drugstore chain reported a decline in December same-store sales. The Pennsylvania-based company said sales fell 2.7% in the month ended Dec. 24. Overall sales fell 3% to $1.43 billion. Pharmacy same-store sales were down 2.8%, while front-end same-store sales fell 2.5%. Rite Aid operated 3,363 stores during the reporting period. The company also announced a refinancing measure, in which it will offer $200 million in 10-year senior secured notes due 2015, using the proceeds to pay off other senior debt due in April and December of this year. Shares were down 1 cent at $3.65 in the premarket.