From Topeka Hy-Vee's Facebook page:
"THANK YOU Topeka Hy-Vee Facebook Fans for your support. Print off the below coupon and save 15% on your order this weekend. Continue to share this great offer with your Facebook Friends. This offer is exclusive to our Topeka Hy-Vee Facebook Fans. Offer good Saturday, April 17th and Sunday the 18th only."
Go to their page here to print off the coupon!