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# Sum Function

# New Sum Function

###### **Now in zztakeoff you can sum certain properties up to the parent item if you like. **


**If you would like to create or use an existing property, when you are ready turn the property into a formula by clicking on the gear on the right top corner of the property window.**
**Common Formulas **
* **sum('area')    this will sum the areas of any child items**
* **sum('volume')  this will sum the volume, this might return cubic feet, so you may have to keep an eye on that.**
* **sum('qty')   this will sum the qty's of any child item.**

**A quick note on this, there will be a chance of creating a circulator loop if you use sum qty's so be aware.**