Yes, deposit is different: it is fixed absolute amount on a single specific product, it is refundable, so in the end your expense will be the price without it.

Yes, deposit is different: it is fixed absolute amount on a single specific product, it is refundable, so in the end your expense will be the price without it. Also it is much higher than any transaction costs. Transaction fees on the other side do require some calculation effort and you have to remember the percentage.