Help me figure out calcium reading please

[DoINeedAName?]

I got this calcium test kit. Stuff turned blue after adding .9 ml have .1 ml left of Ca-2. Test brand is Salifert Calcium test.
Used 2 ml of water, so don’t multiply.

 

[ying yang]

450


Edit: never used this test kit but if used .9 and .1 left then i would read test as 450

 

[Chrisv.]

Yes, 450.good