ERPNext Developer Support in solving few concerns

We are seeking an ERPNext developer who can provide support in solving a few concerns related to troubleshooting and bug fixes.

Specifics:
- The project requires expertise in troubleshooting and bug fixing in ERPNext.
- The client is currently using ERPNext Version 13.
- The concerns need to be addressed within a week.

Ideal Skills and Experience:
- Strong experience in ERPNext development and customization.
- Proficiency in troubleshooting and resolving bugs in ERPNext.
- Familiarity with ERPNext Version 13.
- Ability to work within tight deadlines and deliver results promptly.

Concerns:
- Stock Ageing valuation rate
- Financial Year closing for divisions (cost centers)
- General Ledger Party Child Account Grouping by Account Filter not working
- invoice format design second page header Issue
- last purchase price of the item by same customer showing on new invoice

If you have the required skills and experience, please submit your proposal for further discussion.