Word's formulae need to be inserted as field codes. For example, select your '=SUM(ABOVE)' and press CtrlF9, so you get {=SUM(ABOVE)}, then press F9. To see how to do a wide range of calculations in Word, check out my
Microsoft Word Field Maths Tutorial, in the 'Sticky' thread at the top of this forum:
Microsoft Word Field Maths Tutorial