Few small modifications in a Simple POS Point of Sale Script

General information for the website: POS Point of Sale
Kind of development: Customization of existing website
Description of every page/module: Required few modifications
Description of requirements/features: Required few modifications in accounts
Extra notes: I have an existing POS Online based website where right now maintaining my business, in that script i want to do few small modification for my own requirement details given below.

Script Details:-
Script purchased from envato
Script name: Simple POS bv4
http://codecanyon.net/item/simple-pos-point-of-sale-made-easy/3947976

Demo login is given below
http://spos.tecdiary.org/login
username : admin@tecdiary.com
password: 12345678

Please go through the demo link given above.

What I require is
1. For Expense : http://spos.tecdiary.org/purchases/expenses
I need a Expense category, and required report, with category which is not provided by script default

2. In Sale Report http://spos.tecdiary.org/reports
After opening show/hide form select customer/Walk in Client, on below page you can see the total sales value amount for selected customer, but for all customer there is no total value amount shown, so i need the total value amount for all customers like how it shows for selected customer.

3, 2. In Sale Report http://spos.tecdiary.org/reports
The value of total amount is shown without including tax, so i need a separate total value of total tax, and sale amount included tax total to be shown below the above total in separated cell or row.

4. spos.tecdiary.org
In Dashboard already a top product of month chart is there, additionally i need a top product of present day chart required,

5, I require additional report for day detailed transaction report,
for example:
Total Sales: thousand
Total Tax: ten
Sub Total: thousand and ten

Total Expense: ten
Closing Cash: thousand

6. I require an additional function for packing charges like tax that should be included in POS, please check POS in demo.

freelancer's please apply the job with Starting word PHPSUCCESS in top first line, if i do not see the word then i will not consider your application. to know that you read the job completely i had given the above word PHPSUCCESS.

The above 6 Points are just first job modifications if the freelancer is good and skilled then i will continue to give more additional work. for your kind information i bought this script for only 19$, and i already contact the script developer about the above said features to make over for me, he also agreed to do the features in next release or future release, but i am not in a position to wait until his next release, so i am here to do the custom modification work, also i expect a reasonable fees for the above work, hope you understand, please read the job carefully before applying. Do not simply apply for the job.

Thank you