Json and ajax

Hi guys,
I'm about to lose my mind :).

I have asp.net mvc project and I'm returning json to ajax call from the controller.
Look at my backend method:

public JsonResult Nexttostep8(string manu)
{
var supllst = (from i in dbh.Items
                               join s in dbh.SupplierLists on i.ID equals s.ItemID
                               join sa in dbh.Suppliers on s.SupplierID equals sa.ID
                               where i.ItemLookupCode == "050326120180"
                               select new
                               {
                                   sa.SupplierName,
                                   s.ReorderNumber,
                                   s.MinimumOrder,
                                   s.MasterPackQuantity,
                                   s.Cost,
                                   sa.CustomText5
                               }).ToList();


                foreach (var item in supllst)
                {
                    var i = new suppliersmodel();
                    i.SupplierName = item.SupplierName;
                    i.ReorderNumber = item.ReorderNumber;
                    i.MinimumOrder = item.MinimumOrder;
                    i.MasterPackQuantity = item.MasterPackQuantity;
                    i.Customtext5 = item.CustomText5;

                    if (item.CustomText5 == "LOCAL")
                    {
                        i.Cost = item.Cost;
                        i.LocalCost = item.Cost;
                    }
                    else
                    {
                        i.Cost = item.Cost;
                        i.LocalCost = item.Cost * Convert.ToDecimal(0.84);
                    }

                    lstsupliers.Add(i);
                }
return Json(lstsupliers, JsonRequestBehavior.AllowGet);
}

Select allOpen in new window

Here is my ajax call example:

function Nexttostepeight() {
    var manu = $("#textmanufactureid").val();
    $.ajax({
        type: "POST",
        url: "/PIM/Nexttostep8",
        dataType: "json",
        data: { manu: manu },
        success: function (data) {
            $('#step7').css('backgroundColor', '#2ECCFA')
            $('#step7').addClass('disabled');
            $('ul.setup-panel li:eq(7)').removeClass('disabled');
            $('ul.setup-panel li a[href="#step-8"]').trigger('click');
            $("#manufacturerprogresid").show().html("<strong>MANUFACTURER:</strong> " + manu);
            debugger;
            var suplier = '';
            for (var i = 0; i < data.length; i++) {
                var dt1 = data[0].SupplierName;
                var dt2 = data[1].ReorderNumber;
                var dt3 = data[2].MinimumOrder;
                var dt4 = data[3].MasterPackQuantity;
                var dt5 = data[4].Customtext5;
                var dt6 = data[5].Cost;
                var dt7 = data[6].LocalCost;
}
        }
    });
}

Select allOpen in new window

The issue I'm facing here is - I'm getting the first properties just fine, but the rest come with error.
like:
"Cannot read property 'MinimumOrder' of undefined"

Please, HELP.