Covering your overhead, then making a profit should put you over $75 for the first 1000 sq ft. I do not know how much your overhead is, but $75 comfortable for me. I also like to rotate my preemergents when more than one application is being done within the growing season. Certain weeds are not affected by Snapshot. I like to use it in rotation with Ronstar if the plant material is tolerant. Freehand G is also good in the rotation. I mention these three product because you are probably spreading granules. All of my applications are with the concentrate equivalents applied as a directed spray under and around the plants when the growth habit permits or over the top if the plant is tolerant. Ronstar is a good defoliant if the plant is not tolerant or if it is not washed off of leaves immediately following application.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738