I want to now create a third one, that will be basically the first one minus the second one.
Rather than enter
<? ((sum(JAN) + JAN1 + JAN2 + JAN3)+(sum(FEB) + FEB1 + FEB2 + FEB3)+(sum(MAR) + MAR1 + MAR2 + MAR3)) - (JAN_TOTAL+FEB_TOTAL + MAR_TOTAL) ?>
...is there a way that I can name the first two, and then just reference them in the third ? (Something like <? TOTAL - BUDGET ?>