Sheet metal bend deduction formula

Hello could someone please help with a formula? I'm trying to work out the bend deduction for sheet metal parts. I have the formula but I just don't know how to input it into excel. I've attached the formula here

Screenshot 2023-02-28 094355.png

BA ? Bend allowance
θ ? Bend angle in radians or degrees
r ? Inside radius;
T ? Material thickness.

Here is my current try =2*(M3+M5)*TAN(M2/2)-L13

M3=Radius
M5-Thickness
M2= Angle
L13= Bend Allowance

Thanks in advance

Thats done the trick, I must not have had the angle in degree's. Thanks for that