Customize a CodeIgniter PHP application - "Rise" -- 2

i have purchase an application from Code canyon, i want to customize this application
i want to build calculator and insert in the process and automate task creating.

My requirement is defined
Build Dynamic Form (like google form) with Section and Feilds
a. Host in AWS
b. Connect Other plugins
C. Build the Form
2. Set the Flow and process
a. Flow from quotation, product, production option, sections, fields, Proforma Invoice, Job Card, RFQ, Purchase Order, Task to sub task created
b. Add employee, vendor and supplier module with fields
c. Export & send by mail - Quotation, PI, RFQ, PO, Job card
d. Log of any change in - Quotation, PI, RFQ, PO, Job card
e. Reports with filters of - Quotation, PI, RFQ, PO, Job card
3.Calulation in the fields & section of the form
a. Prepare Cost Sheet
b. Prepare Quotation
c. Create API's

please check the below application, you will have to cusomise this application
https://rise.fairsketch.com/signin