Costing: " $$$"
No costing -No product - No profit thats the bottom line.
You need to know how much it costs you to create your style. Every single thing in a style needs to be accounted for including patternmaking, grading,sample making, cutting, sewing, threads, labels, swing tags, packing, shipping, marketing. Many items are accounted for in "overheads" but each style has a base cost of fabric, cutting, sewing, you add from there to get your cost price which is what came out of your pocket.