calculating from a file

trade19's Avatar, Join Date: Mar 2014
Light Poster
HI I want to ask how I can open a file like this one:
and add together each line (each time the program runs it could add more lines) amount of lines could change below are six.
I want to get a total from these
below would be $28.00 The floats would always be .00
I think these are integer amounts
I am not sure rite now why the program is putting out $0.00 but never mind that.
thanks for any help

Code:
$0.00 
$10.00 
$0.00 
$10.00 
$0.00 
$8.00 


totals= open("C:\\write_it.txt", "r")
totals.read(totalc)
Label(aApp,text= "You purchased: $%.2f \n" %  totalc, font=('times', 10, 'bold')).grid(row=0,column=0)
print('total-c', totalc)
totals.close()
0
trade19's Avatar, Join Date: Mar 2014
Light Poster
also this is how i fed the file

Code:
totals = open("C:\\write_it.txt", "a")
totals.write('$%.2f \n'  % totalc)
print('This is total-C', totalc)
totals.close()
print('total',total,'total b',totalb,'total-c',totalc)