I'd post this in the house builders forum if you don't get any response here.

Alot more traffic there.

$96 a cubic yard plus tax. (six bag limestone mix)

What's monolithic?

Multiply width x lenghth x depth in feet or fractions thereof and divide by 27.

I found monolithic.

Same as the other answer. Get your dimensions for the perimeter and multiply them out.

We paid $10,000 for a 34' x 34' monolithic slab in October.

I got a quote last week in La Grange, Texas of $73 a yard, 3,000 lb, and $79 a yard for 3,000 lb. fiber mesh concrete.
This is just delivered, you have to do your own form work and labor.