How much should I charge for a sponsored video?

Need help with a quote! 😁 I make very niche astrophotography videos and a decent sized company wants to call on Monday. I know they’ll want a dedicated 10 minute video showing off their website and what they offer. Their site has over 8000 paying members with subscriptions starting from £5 a month to £250 a month and have 6 staff members which are based in central London. In the last 28 days I’ve gotten 85,000 views and 4000 hours watch time. But more importantly, my audience are the direct target audience for this company. Making my viewers extremely relevant.

Hopefully thats enough context for you guys? If not, shoot me some questions! I have absolutely no idea what to quote as this would be my first. Thanks in advance :)