Forcast is offering an extra 30% off sale items, prices are as marked in the linked category.
I have found plenty of stylish skirts and trousers for work which are still available in generally all sizes from 6 to 16 for below $35 each. You'll struggle to find these prices elsewhere even on sale, not to mention the selection of sizes in stock... Here are some examples:
* Jessica Peg Pants in black for $20.30
"The Jessica Peg Pants offer a smart, stylish look with a tapered peg leg cut, that features contrast sateen at the waistband and at the seams of the slant pockets. The pants are designed with belt loops at the waistband, a curved fly front opening, two tucked pleats to either side of the pants creating a tailored look, and two false double welt pockets at the back."
* Anita Textured Zip Skirt in white for $20.30
"The Anita Textured Zip Skirt is a fresh take on the classic pencil skirt! The skirt is crafted from a medium weight fabrication with an all over texture and features an exposed double ended metal zipper fastening all down the centre-back. The skirt is filly lined with darts at the back for a great fit, and offers a versatile midi length."
* Sarah Split Wrap Skirt in black for $27.30
"The Sarah Split Wrap Skirt is crafted from a meduim weight textured stretch fabrication and features a wrap over style front with a chic V split. The skirt is designed as midi length with a form fitted pencil silhouette and an exposed metal zipper fastening at centre-back. It is fully lined, with a wide waistband and darts at the back for a great fit."
* Lillian Panel Skirt in white for $34.30
"The Lillian Panel Skirt creates a smart and sophisticated style, perfect for your working wardrobe. The skirt is designed with panel lines running down the back and front, with piping details on the side panels. The skirt is crafted from a light-medium weight textured fabrication and is fully lined with an invisible zipper fastening at the centre back. It also offers a wide waistband and a kick pleat at the back for easy movement."
Forcast offers free express shipping on all orders over $50. They've also got some handbags and shoes on sale as well besides the tops and blazers you could pair these items with to reach to minimum spend threshold.