Easy One-Add more data to existing subtotals

[gshaffner]

I have a page that is subtotaled by day (with a Grand Total). I want to be able to add more days, subtotal and refresh existing grand total. How do I add more data to existing subtotals without removing, adding and resubtotaling? I am sure this is going to be a "Doh" moment but I cannot figure out how to do it. Thanks for any help.

 

[Logit]

	A​	B​	C​	D​	E​	F​	G​	H​	I​	J​	K​	L​
1​			5​			5​
2​			25​			25​
3​			47​			47​
4​			33​			33​
5​		Total	220​		Total 2	110​
6​
7​	Sub SumPlus()
8​	Sheets("Sheet1").Range("C5").Value = Sheets("Sheet1").Range("C5").Value + Sheets("Sheet1").Range("F5").Value
9​	End Sub