combine information in separate text boxes and have that info add up and display in a different text box

i have several text boxes that has information in them and I would like to add that information up and have it displayed in a different text box.  example: Text box 1: 6 baseballs, 4 bats, 3 gloves, Text box 2:  4 baseballs, 2 bats,4 gloves; Text box 3:  2 baseballs, 1 bat, 2 gloves.  Text box 4 would then read: 12 baseballs, 7 bats, 9 gloves.  Is there a script that i could have this done in adobe acrobat pro?  Thank you in advance for your help.