Sum of value in a dictionary

I’m new here. I wanted to sum all the values inside a dictionary, but my values are all strings, I don’t know how to convert the strings to integers…
I really appreciate if anyone can help with it!

Here’s the dictionary with code

dic1 = dict()
dic1 = {‘2012-03-06’:[‘1′,’4′,’5′],’2012-03-12’:[‘7′,’3′,’10’]}
for i in dic1:
print(i,’,’,sum(dic1[i]))

I want the output to be like this:

2012-03-06, 10
2012-03-12, 20

>Solution :

It can be

dic1 = dict() 
dic1 = {'2012-03-06':['1','4','5'],'2012-03-12':['7','3','10']} 
for i in dic1: 
    print(i+','+ str(sum(map(int, dic1[i]))))