Suitable formula for nasal drops Veterinary Prednisolonacetate 2.5 mg/ml

You could prepare expressed per 100 ml

Prednisolonacetate 250 mg; Tween 80 0.2 g; HPMC 0.1 g; , Benzalkonium chloride solution 1% 1 g and freshly cooked water up to 100 ml  

Prepared maybe 15 ml?