Hmmmm...let me see...
In the last two years I have spent roughly $7,000 on licenses, flights, gas, accommodations, etc. for my spring gobbler hunting obsession (don't let my wife see this post!!). In that time, I fired thirteen rounds of TSS through my shotgun at roughly $10 a pop. I suspect this spring I will again end up spending $3,000-$4,000 on all the stuff outside of the ammo...and might, at the very outside, shoot maybe ten rounds of TSS...which might cost me $50 or so more than those rounds cost me last year.
Granted, I am not what one might call a "math wizard", but I don't think I will be worrying too much about that increase in TSS cost in my turkey-hunting budget projections...