Doing a searches for vitamin D indicates vitamin D deficiency is rampant and vitamin D overdose is very rare.
“Acute overdose requires between 15,000 µg/d (600,000 IU per day) and 42,000 µg/d (1,680,000 IU per day) over a period of several days to months, with a safe intake level being 250 µg/d (10,000 IU per day).”
You forgot that Vitamin D is in Milk and many other food products. So don't forget that when adding it all up.