I am trying to use this formula but am unable to get the result as excel gives a message "too many functions" can some one help me with this


=IF(D21180000,D21*0.5%,IF(D21250000,D21*0.75%,IF (D21350000,D21*1.5%,IF(D21400000,D21*2.5%,IF(D21 450000,D21*3.5%,IF(D21550000,D21*4.5%,IF(D21650 000,D21*6%,IF(D21750000,D21*7.5%,IF(D21900000,D2 1*9%,IF(D211050000,D21*10%,IF(D211200000,D21*11% ,IF(D211450000,D21*12.5%,IF(D211700000,D21*14%,I F(D211950000,D21*15%,IF(D212250000,D21*16%,IF(D2 12850000,D21*17.5%,IF(D213550000,D21*18.5%,IF(D2 14550000,D21*19%,IF(D218650000,D21*20%)))))))))) )))))))))