Bulk update prices


We’ve built a site with 20+ forms, 1 form for each product. Each product has a lot of options.
User chooses a product, within the product he chooses his type (different prices for each type) and he chooses his options (different prices / options for each type).
Our supplier increased their price with 5% so we want to increase our prices as well to our buyers.
Is there a way to bulk update all the price fields with 5%?

Thanks in advance.