I am trying to achieve this goal.

Example

If Cell A1 = MSM then CELL A4 will be cell A3+120
If Cell A2 = ARCOM then CELL A4 will be cell A3+90
and so on I probally going to have 5 different if statments but I want to be able to put them all in the same cell. I just need a little assistance on how to do that formula and what I need to do if I add an if statement. Thank you in advance and any assistance will be appreciated