If this is Gordon's Pasture Pro, I think you may have mis-read the label. From what I read, there is a max application rate of 2 quarts of concentrate/acre. I'm also not sure where you purchased yours at, but Tractor Supply has a 2.5 Gal container for about $80. That would bring the spray cost down to about $16/acre.
It sounds like you may have inadvertently picked up Pasture Pro weed and feed, which is weed killer and fertilizer all in one. That does need 1 gal of "concentrate" for .14 acres.
--Rick
It sounds like you may have inadvertently picked up Pasture Pro weed and feed, which is weed killer and fertilizer all in one. That does need 1 gal of "concentrate" for .14 acres.
--Rick