How many combinations of natural numbers -LSB- math -RSB- -LRB- q , d , n , p -RRB- -LSB- / math -RSB- are there where -LSB- math -RSB- 25q +10 d +5 n + p \ geq100 -LSB- / math -RSB- with -LSB- math -RSB- 0 \ leq q , d , n , p \ leq3 -LSB- / math -RSB- ?
How do I solve this math problem ?