Fee Management System for a School.

Hi, we want to have a fee management system for a small school. The following are brief requirements: 1. The system must be developed using php/mysql . 2. The developer has the option to build a new system or to customize an open source system. 3. The system is one user only. 4. In general, The system should have the following functions: 4.1 Paying fees for students ( CASH only - Online payment is NOT required ) 4.2 Printing and editing receipts / bills / invoices . 4.3 Calculating different types of fees according to class levels . 4.4 Allowing discounts and installments . 4.5 Showing lists for students who paid and students who did not pay . 4.6 Showing reports about paying / total paid / total unpaid / ... 4.7 Some RTL changes are required ( RTL is Right-To-Left ) ( e.g. dir = rtl ). 4.8 ( optional ) using SMS Gateway ( API ) to send sms . 4.9 The developer can add more features if he wants . - More detailed requirements will be provided if you are interested. - The budget is limited so please bid on a reasonable price .