Thanks Samzter. Hmm, let me see... The ADA Yamaya stone was $18 (5.99/lbs). The sand was $1. The substrate is a combo of Floramax and Fluval Stratum. I didn't use the whole bag of either substrate (got plenty leftover for another project). The Manzanita branch, from the bird section of Petsmart, was $6. The only flora i purchased was the HC, pygmy chain sword, and Flame Moss, HC and chain sword was about $5 each and the moss was $10 (pretty pricey for rare moss i guess). The other flora are clippings from my other tank (free).
Not sure how to calculate the substrate or if you even count that as decor? I didn't use the whole bag of either.. I actually had the floramax on hand from another project. The Floramax was $10 for 12lbs. And the Fluval Stratum was $11 for 4.4lbs.