How much chelated iron per 1000sq ft for common Bermuda with foliar application

I have about 21000 sq ft that I need to spray. Planned on putting chelated iron and 46-0-0 together. Getting mixed answers of 4,8 and 16 oz per 1k. Also have seen a tablespoon per 1k. It’s the southern ag brand of chelated iron with 5% soluble iron.
Putting down 10.5 lbs of fertilizer with the chelated iron if I could get an answer. The jug I have is 128 ounces and if it’s 8 per 1k, I don’t have enough.