My opinion.They give you too much information. If each nozzle puts out 44 ounces per min, then together you have 88 ounces per minute. For for your test range of 1000 sqft, you cover it in 35/60 of a minute.
So you are applying 51 ounces per 1000 sqft.
A 25 gallon tank contains 128 times 25 or 3200 ounces
Dividing by 51 shows your tank covers 63,000 sqft.
Multiply by 1.8 to find the mix rate or 113 ounces per 25 gallon tank.
51 times 43.560 equals 2221 ounces per acre.
Dividing by 128 equals about 17 gallons per acre