Rewrite the given sentence to use a more formal phrase than the one used in the example.
John had plenty of cash.
John possessed an ample amount of currency.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite the given sentence to use a more formal phrase than the one used in the example.

### Input:
John had plenty of cash.

### Output:
John possessed an ample amount of currency.