3.0 is this right

Want to adjust 10 gallons, to TastyMcd's profile, aka, Moshers Ideal Pale Ale.
Ca-110ppm, Mg-18ppm, Na-17ppm, SO4-350ppm, Cl-50ppm.
In step one you see my water, it pretty soft water.
Don't want to split salts between Mash and Sparge water.
AS you can see i added 10 gallon in "Mash" spot, left sparge empty. Grains are
12# 2-row
1# Cry/80L
.5# Carapills
Is this fine or am i over thinking this, also 5 ml of lactic acid for 10 gallons,good or bad..
THe screen shot blew shows the outcome

Why the lactic acid addition? What is your pH without it?

With "zero" lactic acid added,Ph according to EZ-3.0 would be "5.51"
Add 5ml of acid would get ph to 5.22. That is the ph i should be shooting for,Right.
I would be adding it to the total 10 gallons of water. For Mash and Sparge

The mash pH you want is 5.4 - 5.6 at room temp. Its shown on the EZWater 3.0 spreadsheet above.