Complex sentence: His strong stand got a contract for Rand on December 10,1941, along with a $1000 advance so she could work full-time to complete the novel by January 1,1943.
Split into simpler sentences: His strong stand got a contract for Rand on December 10,1941. She also got a $1000 advance so she could work full-time to complete the novel by January 1,1943.