The  ammonia  prepared  by  treating  ammonium  sulphate  with  calcium  hydroxide  is completely used by ${\mathrm{NiCl}}_2.6{\mathrm{H}}_2\mathrm{O}$ to form a stable coordination compound. Assume that both the reactions are 100% complete.  If 1584 g of ammonium sulphate and 952 g of ${\mathrm{NiCl}}_2.6{\mathrm{H}}_2\mathrm{O}$ are used in the preparation, the combined weight  (in grams) of gypsum and the nickel-ammonia coordination compound thus produced is (Atomic weights in g mol-1: H = 1, N = 14, O = 16, S = 32, Cl = 35.5, Ca = 40, Ni = 59)