I've noticed that the word 'charge' is marked in the Macmillan Dictionary as both countable and uncountable in the same meaning:
charge [COUNTABLE/UNCOUNTABLE] an amount of money that you have to pay, especially when you visit a place or when someone does something for you
I was wondering what that's supposed to mean and what sort of implications does it have? Should I use the indefinite article 'a' in front of it or not?
Also, I had a question about the word 'payment.' Many dictionaries say that when it is used in the meaning of a sum of money paid, it is countable. But I've seen it used in the same meaning as uncountable. So is there any difference, for instance, between 'an additional payment is required' and 'additional payment is required?' And if yes, what is it?
Many thanks for your help! Look forward to hearing from you!