Always mention expected result in your question and provide complete details for what are looking for, I am not sure about your requirement, can you check these:
for RA Bill No only:
=SUMPRODUCT((C2:C39<G43)*(F2:F39))
If you are looking for sum with bill no + specific work order no:
=SUMPRODUCT((C2:C39<G43)*(A2:A39=E43)*(F2:F39))