200 ft2 would require .75 gallons of BondTite 1101 for primer, 1.5 gallons of LiquaTile 1184 for base coat, and either .75 gallons of BondTite for clear coat, or .625 gallons of EnduraShield 2254 for clear coat. The BondTite options is $300 (24.06 mils depth cured), the EnduraShield finish (22.5 mils cured) would be $341 total.
Cured depths don't factor in waste, which is usually about 10%.
It's a bit more per ft2 than usual because the 3 quart kits are priced the same as 1 gallon in the 3 gallon kits, packaging, economy of scale, and all that.