You pay what you can afford. 1100sqft unit requires a min. of a two ton unit. prices range from 2100-2900 depending upon the seers of the system. 13 seer is the min. the law requires and for your situation with 1100 sqft. do not worry about the seers as long as it is to code. the bigger the house the more seers for economy.
In general, a college is an institution of higher education that may stand alone or make up one part of a university. There may be several colleges that cater to a variety of specialized professions in law, medicine, the liberal arts, etc. on a single university's campus.
Quick Answer. An undergraduate is someone who has not graduated from college, while a postgraduate is someone who is continuing his education after he has obtained a bachelor's degree. An associate degree is an undergraduate degree, as is a bachelor's degree. Postgraduate degrees include master's degrees and doctorate degrees.