A builder`s level & reference hubs will be used to provide a uniform trench bottom elevation of 93.50`. During excavation, a rod reading of 5.12` is taken on a nearby hub. This elevation is 102.2`. The builders level is turned and a rod reading of 11.5` is taken in the trench to check the excavation depth. What is the additional cut needed to reach the required trench bottom elevation?

A builder`s level & reference hubs will be used to provide a uniform trench bottom elevation of 93.50`. During excavation, a rod reading of 5.12` is taken on a nearby hub. This elevation is 102.2`. The builders level is turned and a rod reading of 11.5` is taken in the trench to check the excavation depth. What is the additional cut needed to reach the required trench bottom elevation?