Carter and Isabella run a carwash business. They split the revenue $50/50.$ They are deciding on if they should join forces with Carla's carwash.

If they join with Carla, the combined carwash will make $$2400$ more per month, but they'll have to split revenue equally $(33\mathrm{.}3/33\mathrm{.}3/33\mathrm{.}3).$

On an average month, Carter and Isabella's carwash makes $$6000.$

How much more or less would Carter or Isabella individually make if they merged with Carla's carwash?