the amount(s) of

They didn't deliver the right amount of sand.
There was one delivery of sand.


Small amounts of land were used for keeping animals.
More than one amount (area) of land


He paid regular amounts of money to a charity.
More than one amount (sum) of money.


The new tax caused a huge amount of public anger.
One amount of public anger.


I had a certain amount of (= some) difficulty finding the house.
One single amount of difficulty.


You wouldn't believe the amount of trouble (= what a lot of trouble) I've had with this car.
As previous example. A single cumulative amount of difficulty.