Cakes
A: How many cakes should we cook?
How many cakes should we bake?
B: I think it's okay 20 chocolate cakes and 20 cheese cakes?
I think it's okay if we bake 20 chocolate cakes and 20 cheesecakes.
A: We were able to sell 35 chocolate cakes and 5 cheese cakes yesterday. Cheese cake won't sell much.(Can I also say Cheese cake hardly sell?) Chocolate cake is more popular than cheese cake.
All good! The way you said it first is correct. Or you can say "Cheesecake hardly sells."
B: Okay then, we had better preparing 35 chocolate cakes and 5 cheese cakes.
Okay then, we had better bake (or prepare) 35 chocolate cakes and 5 cheesecakes.