I'm very doubtful about those surcharges being legal in the Netherlands. At minimum they need to be technically public knowledge.
IIRC it's also required that the declared sales price at the register is correct and with no surprise surcharges like VAT is in the USA (well, BTW, but it translates to VAT and that's included in the listed price in the Netherlands), but for consumer facing shops (which is basically most shops you'll deal with) the price listed on the shelf is correct by custom. It's understood that the price isn't always correct, the labels often need to be updated manually and so there can be a delay when the electronics already updated that morning but the staff haven't yet replaced the shelf price, but if there's a discrepancy between the price listed at the register and the price listed at the shelf, whichever is preferred by the customer wins.
So... yeah. That surcharge if it was tried here?
Expect loss of custom at minimum, the Consumer's Union attention at best and quite possibly legal trouble
IIRC it's also required that the declared sales price at the register is correct and with no surprise surcharges like VAT is in the USA (well, BTW, but it translates to VAT and that's included in the listed price in the Netherlands), but for consumer facing shops (which is basically most shops you'll deal with) the price listed on the shelf is correct by custom. It's understood that the price isn't always correct, the labels often need to be updated manually and so there can be a delay when the electronics already updated that morning but the staff haven't yet replaced the shelf price, but if there's a discrepancy between the price listed at the register and the price listed at the shelf, whichever is preferred by the customer wins.
So... yeah. That surcharge if it was tried here?
Expect loss of custom at minimum, the Consumer's Union attention at best and quite possibly legal trouble