When you are ordering multiple items of the same product, the product pricing is the unit price multiplied by the number of items.

E.g. in the example below, 1 Classic Matte Paper poster in 13x18 cm / 5x7" format is EUR 4.49. This means that if you place an order for 2 Classic Matte Paper posters in 13x18 cm / 5x7" format the product cost will be EUR 4.49 x 2 = EUR 8.98.