Dynamic problem!

here’s the deal:
I have a timer in my game, and then when all the levels are done, all the times are showing…
Now I also have a password-thing, so that ppl can skip levels.
Then, when you’ve made all the levels, it just says “time: none” on those that you skipped, but that totally messes up a Total Time that I have.
It says nonenonenone4025 and so on…

Is there a way to say

If there's a number in 'time1', add that to total 

or something…
Cause now all I have is:

total = time1 + time2 + time3 + time4 ...........

Hope you understand the question, and that you have a solution :smiley: