better you can go with front-end. Goto settings -> security -> access control list -> make the access control list manually like this.before that you need to add the group with specific control.

Hi Vinod Kumar

W.r.t your query, I have gone through it and tried to replicate it. Few recommendations which I would like to suggest you which might cater to your needs are as follows:-

1) Yes its possible to assign Sales Menu access for newly created user group

2) For the newly created user group in order to assign access as per group,following can be done while creation of the new groups :-

i) Firstly under Access Rights in groups you just need to add the model name and assign the rights such as READ,WRITE,CREATE & DELETE. This can be done by following Settings >Users>Groups

Refer this screen shot for more details :- http://prntscr.com/a1qzfl

ii) One prerequisite is that the models needs to be defined/developed first so that the same can be assigned along with their access rights for the newly created user groups.

In case your issue is still not solved, kindly let me know.

Hope it helps

 Cheers!!