I have this field that gets populated by an external service and I want to extract the number values from it then sum the numbers up. For instance, see the text below
United Kingdom: 3, Ireland: 1, Netherlands: 1, Spain: 2, Australia: 1
I would like to extract 3,1,1,2,1 and sum them individually to have 8. i.e. 3+1+1+2+1 = 8.