the formula is rather complicated but here it is:
=IF(AND($D3<$K$3,C3="Quadruple (4) Occupancy Room"),"185",IF(AND($D3<$K$3,C3="Triple (3) Occupancy Room"),"215",IF(AND($D3<$K$3,$C3="Double (2) Occupancy Room"),"265",IF(AND($D3<$K$3,$C3="Single (1) Occupancy Room"),"465",IF(AND($D3<=$K$3,C3="I will not be staying at the hotel"),"55",IF(AND($D3<$L$3,$D3>=$K$3,$C3="Quadruple (4) Occupancy Room"),"200",IF(AND($D3<$L$3,$D3>=$K$3,$C3="Triple (3) Occupancy Room"),"230",IF(AND($D3<$L$3,$D3>=$K$3,$C3="Double (2) Occupancy Room"),"280",IF(AND($D3<$L$3,$D3>=$K$3,$C3="Single (1) Occupancy Room"),"480",IF(AND($D3>=$K$3,$C3,$D3<$L$3="I will not be staying at the hotel"),"70",IF(AND($D3>=$L$3,C3="Quadruple (4) Occupancy Room"),"215",IF(AND($D3>=$L$3,C3="Triple (3) Occupancy Room"),"245",IF(AND($D3>=$L$3,C3="Double (2) Occupancy Room"),"295",IF(AND($D3>=$L$3,C3="Single (1) Occupancy Room"),"495",IF(AND($D3>=$L$3,C3="I will not be staying at the hotel"),"85",)))))))))))))))
it will either generate 185, 215, 265, etc. but I think the number that gets generated is considered "text" and because of that the =SUM function won't work.