Can't say for sure without seeing more than one record of the source data, but perhaps you're wanting something like:
SELECT Quote_ID, Cost AS Stage_1_Calc, Null AS Stage_2_Calc, Null AS Stage_3_Calc,
Null AS Stage_4_Calc, Null AS Stage_5_Calc,Null AS Stage_6_Calc
FROM tblCommissionNew;or...