Expand White Background on Sportswear Pack Shots

I need assistance in editing my pack shot photos for clothing, specifically sportswear. The main task involves expanding the white background of these images. The edited photos should be delivered in JPEG format.

Ideal skills for this job include:
- Proficiency in photo editing software (e.g., Adobe Photoshop)
- Experience with product photography
- Attention to detail to ensure the expanded background looks seamless

I have attached an example. We need 1024 x 1024.