Stock up on Arm & Hammer at Rite Aid, starting Sunday! This laundry detergent will be on sale for $1.99. Bottles of liquid detergent and bags of single-dose detergent Paks will both be on sale. Use printable Arm & Hammer coupons at checkout. The final price will be just $0.99. Print the coupons now and save them for this hot sale next week.