An integer N (1 ≤ N ≤ 10^2), an integer M (1 ≤ M ≤ 10^2), an integer W (1 ≤ W ≤ 10^4), and an integer T (1 ≤ T ≤ 10^4).
A list of M tuples, each containing a string Si, an integer Vi (1 ≤ Vi ≤ 10^2), and an integer Pi (1 ≤ Pi ≤ 10^4).
A list of N tuples, each containing an integer Li (0 ≤ Li ≤ 10^2), an integer Xi (-10^2 ≤ Xi ≤ 10^2), and an integer Yi (-10^2 ≤ Yi ≤ 10^2).
A nested list where each sublist corresponds to a town and contains Li pairs of integers Ri,j (1 ≤ Ri,j ≤ 10^3) and Qi,j (1 ≤ Qi,j ≤ 10^4).

### Example Input:
```
2 3 10 15
apple 2 100
banana 3 150
cherry 1 200
2 1 1
10 300
20 400
1 -2 -3
5 500
15 600
```

### Function Signature:
Write a function f(N, M, W, T, products, towns) that takes in the input.
```python
def f(N: int, M: int, W: int, T: int, products: List[Tuple[str, int, int]], towns: List[Tuple[int, int, int, List[Tuple[int, int]]]]):
    '''
    N: an integer
    M: an integer
    W: an integer
    T: an integer
    products: a list of tuples, each containing a string and two integers
    towns: a list of tuples, each containing two integers, another integer, and a list of integer pairs
    '''
```