One semester of calculus is prerequisite to ECON 150, 231, and 232. Two semesters is better.
Math 219 substitutes for ECON 150. Math 218 & 218L with ECON 253 equals ECON 150 + 253. For minors, Math 218 & 218L equals ECON 150.
Only 3 hours of independent study will count in a program.
ECON 115 counts as an ECON elective below 250.
Courses numbered over 250 have either intermediate microeconomics or intermediate macroeconomics as prerequisites. By implication, they also may use calculus.