Codeigniter page/module creation

Hello there, we use a small pos system, for demo please visit this ( https://sma.tecdiary.net/admin/login ) link, in this, we need to replicate the existing below pages:

1. https://sma.tecdiary.net/admin/products => https://sma.tecdiary.net/admin/rawproducts
2. https://sma.tecdiary.net/admin/products/add => https://sma.tecdiary.net/admin/rawproducts/add
3. https://sma.tecdiary.net/admin/products/quantity_adjustments => https://sma.tecdiary.net/admin/rawproducts/quantity_adjustments

4. https://sma.tecdiary.net/admin/purchases => https://sma.tecdiary.net/admin/rawpurchases
5. https://sma.tecdiary.net/admin/purchases/add => https://sma.tecdiary.net/admin/rawpurchases/add

These pages are not linked to original products or purchases. Let me know the cost and time required for this work

thank you