Need help with pharmacy calculations

Each potassium vial is 2mEq/ml so for the bag of 20mEq/ 1000ml
2mEq = 1ml
20mEq = x
20/2 =10
so you will add 10ml of the potassium into the 1000ml
For a 24hr period you would need total of 3000ml
that is 125ml/hr x 24 hrs = 3000ml
For the potassium that would be 30ml