i need help building a php shipping fee calculator that uses product category and region to calculate [closed]

please i need help writing a php code that would work for my productcategory/regional based shipping fee calculator.the idea here is that the product category has a particular shipping fee for each city/region. for example: category=tshirt

city/region=newyork(the delivery fee changes by different city)

delivery fee=$10

as seen above the shipping fee for tshirt category in newyork is $10 then in another city of thesame category it would be like this

category=tshirt

city/region=boston(the delivery fee changes by different city)

delivery fee=$15

source https://stackoverflow.com/questions/71289272/i-need-help-building-a-php-shipping-fee-calculator-that-uses-product-category-an