Ok i see a language problem here. For the best health of the shrimp they should be kept in the lower range of temp.
The females will become "saddled" when they are sexually mature and healthy enough to carry eggs. Being saddled means they will have the eggs inside their body and if the shell is slightly transparent you will be able to see them looking like a horses saddle (on the inside of the shrimp). When the females are ready they will mate with a male shrimp. This happens only once and only when the female is ready. Once that happens the female will lay the eggs, transfer the fertilized eggs to the outside of her body, and carry them under her tail section. This is called "Berried". There will be no more breeding until the eggs have hatched and the female is saddled again.
RCS breed easily and you will find that the population will increase faster than you can cope with once they have settled into your tanks. 1 female can give birth to between 20 and 200 babies, 3-4 times a year and the babies will become mature enough to breed in about 4 months. Not all of the shrimpets will be of a high quality so some will have to be removed from the tank. This is called culling. The cull shrimp should not be sold on as they are of a lower quality. If you leave a low quality shrimp in the tank then it will breed with the others and lower the quality of the next generation and will give you even more shrimp to cull. Even leaving 1 low quality male in the tank can cause you to have hundreds of low quality shrimpets hatched in the next generation because it can breed with many females. Not what you want.
Keep the shrimp healthy and let the breeding happen at a normal rate. Remove the lower quality shrimp before they are sexually mature so your tank stays of a high quality and then sell what extras you have.