VBA Command Button Macro

Ok, so I haven't added the code to pull up the Userform, and ignore my horrible coding I'll make it look pretty once I get it all done..

So basically, what I want it to do, is when the person "Add Loot Total to Spent Points" I want it to take the value of totcost and add it to the selected person Sent Points section. So if they purchased a gear for 1000 it would take the current 100 and add 1000.