Walmart.com or Amazon Add-On: Krusteaz Cinnamon Swirl Crumb Cake and Muffin Mix, 21-Ounce Boxes (Pack of 4) – $7.36

Ships from and sold by Amazon.com. Cheapest price currently per CCC.
These are normally $2.59 – $2.79 each at my Stop & Shop. I have bought them several times, and they are very good.
Walmart.com with Free store-pickup – $1.84 ea. – Put Qty 4, as they are sold individually: (If you buy 4, with free store p/u – $7.36)
https://www.walmart.com/ip/Kruste…Z/10307492
Amazon Add-On (Use Amazon Alexa app to avoid $25 purchase requirement) – $7.36 for 4 ($1.84 ea):
https://www.amazon.com/Krusteaz-C…Z4ZWZ&th=1