How would you calculate this? (question explained further in post)

This is Trader Joe’s Pizza Ranch Salad Kit. It was in the fridge too long and the veg got gross. Tossed that but kept the dressing and add -ins. Planning on using it tonight with fresh chopped lettuce, but can’t find the individual calorie info for each item. I’m just curious how other people would go about calculating this. What would you do? 🤔