Problem with loops in the CalculateMiGa() method

Problem:

I am having trouble with the trip = new Trips() the dist and qtygal are not functioning properly I don't know why the result outcome is both dist and qtygal is 0

Desired result:

each trip in the triplist should only have either dist to equal 0 or qtygal equal 0 not both. or even better if i can combine the two loop together

        private void CalculateMiGa()
        {
            Trips trip;
            triplist = new List<Trips>();
            double dist=0;
            double qtygal=0;
            if (lstTruckNum != null)
            {
                for (int i = 0; i < states.Length-1; i++)
                {
                    foreach(string il in lstTruckNum.Items)
                    {
                        foreach(var li in truckstopProductQty) 
                        {
                            if(li.STATE==states[i])
                            {
                                if (li.Vehicle.ToString() == il)
                                {
                                    qtygal += li.Quanty;
                                }
                            }
                            trip = new Trips(li.Vehicle, li.STATE, dist, qtygal);
                            triplist.Add(trip);
                        }
                        qtygal = 0;
                    }
                }
                foreach (var i in vehiclesStateDistance)
                {
                    dist = i.Distance;
                    trip = new Trips(i.Vehicle, i.State, dist, qtygal);
                    triplist.Add(trip);
                }
            }
        }