Modification of 1 php files, based on specifications given

General information for the website: Selling Toner Cartridges
Kind of development: Customization of existing website
Num. of web pages/modules: 1
Description of requirements/features: We have a php file called supplier_prices.php where the products are in rows and suppliers in columns, the price of each product is displayed in the suppliers column in a text input field.
The work is simple 15 minuts to understand and for a programmer 10 minuts to fix and other 15 minuts to test total not more than one hour:
We want to the Product Price to add a fixed amount of transport (Shipping) which will take a certain field from the base (bulk_price). We also want to be able to enter values to the database because now our text input field only display the values of the base we are not able to change those prices.
The "href Links" that brings you to the supplier product page as it works now (klick on 5,04) must work as it is now but at the new price with the shipping.
See File Attachment.
Payment methods: Specific Payment Gateway, Other
Specific technologies required: php mySQL
Extra notes: