How to sum values from a table in column in mvc5

hi guys i am trying to sum all values from my table in 2 column how can i do this here example image for my question i wont sum boys and sum girls

here is the code what should i do

public ActionResult ShowPation()
{
var query1 = from t in db.Pations.Include(b => b.Type_Services).ToList()
let Agerange =
(
t.Age >= 0 && t.Age < 1 ? "Age Under 1 year" :
t.Age >= 1 && t.Age < 5 ? "Age from 1 to 4" :
t.Age >= 5 && t.Age < 15 ? "Age from 5 to 14" :
t.Age >= 15 && t.Age < 25 ? "Age from 15 to 24" :
t.Age >= 25 && t.Age < 45 ? "Age from 25 to 46" :
"age over 47+"
)
let Sex = (t.Sex == 0 ? "boys" : "girls")
let Type_S = t.Type_Services.NameService
group new { t.Age, t.Sex, Agerange } by new { t.DateWared.Year, t.DateWared.Month, Agerange,Sex,t.Type_Services.NameService } into g
select g;
var query2 = from g in query1
select new { mycount = g.Count(), g.Key.Year, g.Key.Month, g.Key.Agerange,g.Key.Sex ,g.Key.NameService,};
var query3 = from i in query2
group i by new { i.Year, i.Month ,i.NameService} into g
select g;
Dictionary> urn = new Dictionary>();
foreach (var item in query3)
{
foreach (var item1 in item)
{
if (!urn.ContainsKey(item.Key.Month + "/" + item.Key.Year+ item.Key.NameService))
{
urn[item.Key.Month + "/" + item.Key.Year + item.Key.NameService] = new List();
}
urn[item.Key.Month + "/" + item.Key.Year+ item.Key.NameService].Add(new UserRange { Count = item1.mycount, AgeRange = item1.Agerange,Gender=item1.Sex});
}
urn[item.Key.Month + "/" + item.Key.Year+ item.Key.NameService] = urn[item.Key.Month + "/" + item.Key.Year+ item.Key.NameService].OrderByDescending(i => i.AgeRange).ToList();//sort the data according to Agerange
}
return View(urn);
}