ANSWER:

If the cash + silver reaches the value of 595 grams of silver, or the cash alone, you must give zakat on it. Similarly, if the cash + gold reach the value of 85 grams of pure gold, there is zakat on it. 

QUESTION: If the monetary value of (gold) or of (gold+cash) or of (gold+silver+cash) passes the silver nisab but not the gold nisab then do we pay zakah? Or is the silver nisab limited to only if (silver) or (silver+cash) passes it?