Clothing Manufacturing - repost

I need 50-100 leggings per design (three designs total) ASAP. I have the fabric, elastic, thread, and samples. The designs are over-locked stitched with a cover-stitch hem at the ankle and waist. The leggings are a two-piece design so they have no outside seam. I need three different sizes per design and each design has 2-3 color schemes. I need a 2-3 week turn-around and I need to know how much to produce each piece per design as well as the price-break points.