All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
80 grams of gold alone is not enough to amount to the Nisaab (minimum amount liable for Zakaah). 550 grams of silver alone do not reach the Nisab either. The same thing can be said about the 700 Riyals. Therefore, whoever owns such wealth on which one full year elapses, has to combine them together. If all these items of wealth are altogether equal to 85 grams of gold, then he has to pay the due share of Zaakah which is 2.5%.
For more benefit on the Nisaab on gold and silver, or money, please refer to Fataawa 120900, 310765, 329086, 81355, 81332 and 86629.
Allah knows best.