I am looking for help with a macro.

I have a userform where I use combobox1 to select the person I need. I need
the macro to lookup the matching value in combobox1 to the value selected
from column A.
then using code, I wish to add the value of textbox1 to the value of the
cell in column b and have the total of the two be laced in that cell.

for example i have

combobox1 value = greg

textbox1 = 5



column a column b
greg 3


I would like for column b to change to 8


How would I do that?


Thanks Greg