Please help me write a formula that will allow me to type any one of the
values in the left column in the key below in a blank cell and give a
numerical value that corresponds to key in the adjacent cell next to the
blank cell.

For example if I type GM in a blank cell I want the cell to the right to
give me 1.0. (Also in that same cell if I type any of the other items in the
column on the left I want it to give me the number that corresponds to it.

Here is part of the key (there are other items that will have corresponding
numbers ranging from 0 to 1.25):

GM 1.0
W4 1.0
D5 0.5
3M 1.25
4M 1.0
PO 1.0
RO 1.0
MSB 1.0
NICL 1.0
DPO 1.0


Thanks,
Buttercup