Price manipulation penetration testing tutor required

Job ID: 33884427

Budget: $8 – $30 USD

I need a tutor who is expert on price manipulation penetration testing. You need to teach me the following things-

1. How to identify price manipulation vulnerability.
2. The coding differences between vulnerable and non-vulnerable sites.
3. After manipulating the "Amount" entry with Burpsuite, some sites accept that payment and some sites don't. Explain the coding differences between those 2 kinds of sites. And also explain how to identify such coding vulnerability.