Pick a Brick total bricks not correct.

I imported an csv with 2800+ pieces (non unique) and the website says ~900 pieces above the pricetag, is that unique pieces? And if not can I export it as an csv to buy from bricklink? (Yes I am an newbie to moc building I dont know how Pick a Brick works) submitted by /u/Dear_Preference9874 [link] [comments]