Anne's Babysitting Center currently rents a 1200 sq foot facility for her 20-child facility. Her business has gotten five stars on Yelp, which has prompted more applications. She has to make a decision between expanding her operations to an 1,800 sq foot facility or staying in the current facility.

Shown is the cost data of the options:

What is the differential cost of the two alternatives:

A) move to a larger facility or B) stay in current facility?