hi, would like an estimate for the following works. House 22x80
car porch extension - remove 12x10 roofing, with 2 concrete pillars, and side roofing - tiles 7x12.
Replace with concrete L shape flat roof- flat with following measurements

front - 14(pillar site) x 12, with 2" overhead extension ( 16x12 ) - 2 pillar required - attached to main pillar
side - 7x12 with 1" overhead extension - 1 pillar required to main pillar.
estimate sq feet - 270sf roof slab. with equivalent floor tiling 270sf.
can you please give a rough estimate.
thank you