Joe Contracted with Sam,agreeing to Pay Sam $400 If Sam

Multiple Choice

Joe contracted with Sam,agreeing to pay Sam $400 if Sam would build him a bookcase.The essential terms included the type and quality of the wood,the dimensions,and the date of completion-February 14,2012.The work went more easily than expected and Sam said to Joe,"If you pay me another $50,I will have this finished and be out of here by February 8." Joe agreed.If the bookcase were done to specifications by the 8th,but Joe refused to pay anything,Sam would be entitled in law to

A) nothing.
B) $400.
C) $450.
D) only $50.
E) $400 plus damages.