Cost of images:
All Patternbank files (also known as Premium Images on Printful) available in the Design Maker cost $1 plus tax, per each image, per placement. For example:
A t-shirt order with one Premium Images file placed on one sleeve will cost you $1 plus tax
A t-shirt order with one Premium Images file placed on both sleeves will cost you $2 plus tax
A t-shirt order with two Premium Images files placed on one sleeve each will cost you $2 plus tax
The Premium Images fee will be charged along with product, fulfillment, and shipping costs. That is unless you've subscribed to Printful Pro. With it, you can use the Premium Images at no extra cost.
If your store operates in a currency other than USD, the cost of Patternbank files will be automatically converted to the currency of your store/order under the latest exchange rate.
The Premium Images fee is taxed. The sales tax depends on the destination of your order. For example, if a customer in California buys your product (fulfilled in the US) that features one Patternbank image, in one placement, you will be charged $1.00 plus sales tax of that state. If you have a resale certificate in that state, you will be exempt from that tax fee.