Complex sentence: Toyota estimated to sell approximately 5000 Corolla XRS per year, although production numbers have not been released, it has been speculated that less than 7000 were produced (unofficially estimated at 6619 units).
Split into simpler sentences: Toyota estimated to sell approximately 5000 Corolla XRS per year. Production numbers have not been released, however it has been speculated that less than 7000 were produced (unofficially estimated at 6619 units).