Search your part by entering keyword or manufactuer part number into search box.
Enter quantity you want to purchase in the textbox under the column getting highlighted with name "Get prices on your requirement", and then press Enter. This will show you all the options available out of the result of your search to "Add To Cart" and "More Stock Options"
button. Also all the options whose MOQ is more than your entered quantity and multiples not adding up to it will not be available to add to cart. You can also add those parts in cart by entering the right MOQ required for those as displayed in the snapshots below.
Click on the "Add To Cart" buttons, will place your goods in your shopping basket
More Stock Option
Click the basket indicator on the top right corner of every page. You will be able to view the contents of your basket, with stock and pricing information related to the selected products, delivery charges based on the current value of your basket and the amount you still need to spend to qualify for free delivery on your order.