How plentiful mg. phenylephrine is contained by 2 oz. salve if it is .25% phenylephrine.?

How plentiful mg. phenylephrine is contained by 2 oz. salve if it is .25% phenylephrine.?
0.25% phenylephrine implies 250 mg within 100g of ointment.
100g = 3.53 ounces.
250/3.53 = x/2
x = 141mg
.4mg i reflect