I dont know how to help with a mix insulin 70/30 is 70% slow insulin with 30% fast insulin mixed in. so every time you take an injection you get both insulins weather or not you need both. the slow insulin lasts 12 hours the fast lasts 4 to 6 hours.
I use long 24 hour insulin with a rapid insulin last 4 hours. the long insulin is for my fating and the rapid is for high BG and food. easy to adjust and easy to get good numbers.
Please check with your physician about when to take the insulin and how often. There's no one right way, and every person is different. Your physician will give you the best information. ~Lynn @Glucerna