I can make the first "If" function work but when I want to add to it I keep
getting an error. Not sure which function I should be using?

If B6 = "1 x 4" then divide D6/12 then multiply times 0.17, If B6 = "2 x 2"
then divide D6/12 then multiply times 0.12, If B6 = "2 x 4" then divide D6/12
then multiply times 0.23, ........

I have 9 total to enter but I can narrow it down if I can only do 7 in one
strand.