var workbook = new Workbook(PathToFile);
var worksheet = workbook.Worksheets[0];
var positions = ???
???
foreach (Row row in positions)
{
    var item = new Disclaimer
    {
        Count = (int) row[J7 + n].Value,
        Price = (decimal) row[K7 + n].Value
    };

    Items.Add(item);
}