How do I remove the word “Free” from my subcategories?

Hello, I followed the instructions to create subcategories in my order form however the word “Free” is still showing next to the sub categories. How can I remove this word?

Inject this CSS codes to your form to remove them.

span#input_16_1008_price,

span#input_16_1009_price {

    display: none;

}

Guide:  How to Inject Custom CSS Codes

Expected result:

Perfect, thank you!