Complex sentence: A'Perfect Delivery' is achieved by successfully delivering to all current subscribers, and this award doubles bonus points for each house delivered to, as well as reinstating one lost subscriber, up to a maximum of 10 out of the 20 houses being subscribers.
Split into simpler sentences: A'Perfect Delivery' is achieved by successfully delivering to all current subscribers. This award doubles bonus points for each house delivered to, as well as reinstating one lost subscriber-up to a maximum of 10 out of the 20 houses being subscribers.