The Levemir is NOT on a sliding scale. It is a given does once a day Or twice a day. 12 hours apart.
is his 224 after eating or first thing in the morning before food or drink?
Humalog is to bring down the BG and Levenir to maintain his fasting BG
blood sugar is 224 before he eats
That is way too high call his MD to find out how much humalog to give him.
Is he a T1 or a T2
I suggest you find a course on insulin usage. at a hospital or health center, its not like taking aspirin. The dosage depends on BG and amount of carbs to be eaten and his particular sensitivity or resistance to insulin.