To get the discounted price of each item you can use the rule of three. If a product is given a 35% discount on the regular price, then the sale price of the item will be 65% of the regular price because

Then you have,
First article

So, the price of the first item with a 35% discount is $ 2.72.
Second article

So, the price of the second item with a 35% discount is $ 2.01.
Third article

So, the price of the third item with a 35% discount is $ 2.45.
Fourth article

So, the price of the fourth item with a 35% discount is $ 2.14.