22 Tomato and 11 pepper plants, spacings a little tighter than it should be on some of the tomatoes, but it should be okay.
It's less about maximizing in volume in the way you seem to be thinking.
20 tomato plants planted too close together are going to produce X tomatoes of shit quality.
10 tomato plants planted too close together will produce X tomatoes of a slightly better quality.
6 tomato plants at this grouping would produce potentially normal quality fruits.
I'm almost positive those pepper plants won't produce anything.