It worked now...thank you yoyo and tarek2...appreciate it. :D
Cool no problem
This Answer is for the First question:
There is no way around it, you have to loop through each one of them and add the Values to a Variable first as yoyoEleanor showed you, but if you wanna avoid doing it every Thick, One alternative is to create a "Global Variable" then add at the start of the Layout the Total of all the Variables then after just keep updating it whenever one of them changes the Value of their Variables.
Your Trigger for changing RandomValue:
Action: Subtract the old Value from "Global Variable" then add the New Value