How can I justify purification?

Assalamualaikum.

Apple is considered “Shariah-compliant.” However, Apple relies on short-term debt to manage its supply chain and offer financing options for its iPhones. Without these debt instruments, Apple wouldn’t be able to generate a significant portion of its revenues, especially from iPhone sales. In other words, without access to debt financing, the reliability of Apple's future free cash flow would be compromised, likely reducing its current market value. Thus, Apple wouldn’t be as valuable as it is today.

Where does one draw a line? How can we determine an accurate percentage since we cannot, in good faith, base our charitable donations on a company’s debt ratio?

Thoughts? Jazakallah khayr.