While I didn't find super cheap items to recreate her look, I think all of the items are versatile enough that they'll go a long way in your wardrobe if you choose to spend a little more. The outfit starts out with a classic trench like this one from Nordstrom ($98). I also found another option on sale for $69.99 although it has less sizes available - click here to view and click on the photo below for the Nordstrom option.
Next you'll need a simple white vneck ($6.50), and some navy pants ($98). I chose to feature these J Crew pants because they look a little dressier but I also found these at Banana Republic for $69.50 that would work for a more casual look. Click on either photo below for more information.
Finally, don't forget shoes and accessories (you'll only need one bangle out of the bunch below):