[Gingerbread]

I need to be able to create a mail merge document that adds together several
mail merge fields. The only way that I have been able to do this in the past
is to create a hidden table in which I insert the separate fields and then
sum them. That is no longer working as I need to include more calculations.
What I want to do is to do is something like the following: { MERGEFIELD
Test1 } + { MERGEFIELD Test2 } (note for this example I typed in the braces)

Unfortunately I have to use word for this

I have not found any way of doing this, does anybody know if it is possible