tx.cs

Report report = new Report() { Name = "Test Report 2018" };
report.Sales.Add(new Sale()
{
    Customer = new Customer()
    {
        Name = "Customer 1",
        City = "Charlotte",
        Id = 1,
        Street = "6672 Test Street",
        Zip = 27781
    },
    Product = new Product()
    {
        Name = "My Product 1",
        Price = 7782.12m
    }
});

DataSourceManager dsManager = ribbonReportingTab1.DataSourceManager;
dsManager.LoadSingleObject(report);