How to assign custom shipping price?(Without assigning shipping class)

Hi! My client wants to set custom shipping price to products.

He is okay with shipping class too but since the price in shipping class are not shown in ascending/descending order, Like $1, $2, $5, $10, $20 and $50 but instead it shows by the first number like $1, $10, $2, $20, $5 and $50. When there are a lot of shipping classes, this kind of order makes it hard for my client so he want’s to set a custom value straight from the get go.

This makes him confused to set shipping based on shipping class.

So, I have 2 options. Either make the shipping class appear based on ascending order or have shipping a function to set a custom shipping price when adding the product to WooCommerce.

Or maybe there is a plugin that can help with this? Preferably a free one.

Thank you very much in advance.