except we ship lustermax free anywhere in the nation and its $370 for 20kg which is and really 30g per lb of biomass is really about the sweet spot. so lets redo your numbers a bit and instead of starting off by skewing the numbers to meet your sales pitch. Start off your new business venture comparing actual real numbers.
And not on sale its 8kg pretty much for $200. So your product takes 2x-3x. Not on sale that same 8kg is 200$ and thats your biggest size(not buying 200lbs). Not including shipping.
so the same 20kg of your product not on sale is gonna cost a customer $450 not including shipping and its gonna cost you a lot to ship them plastic bins to the east cost. SO ADD $70 roughtly $520 shipped for 20kg. and you need 2-3x the amount. this sounds like another skreb filler sales pitch! LOL
I still dont see how this is cheaper. Im not gonna break it down to cost per gram because its more expensive per KG shipped and you need 2x-3x the amount. Maybe im missing something? I see extractor solutions is selling everything in there store 30% off. And that brings down their SALES cost of lustermax to around $300 for 20kg not 20lbs. 
People should really read this thread and look at the type of advice this seller provides…
Just so everyone knows. @GCFFiltration is @CuriousChemist22