Here's a catchy and engaging way to finish your sentence and potentially use it as a TikTok/video title or blog post:

"I Did a 12-Hour TikTok Shop LIVE and Made $4,863 in Sales – Here's What Worked (and What Didn't)"

Other title variations you can use, depending on the result and tone you want:

If you did well:
"I Did a 12-Hour TikTok Shop LIVE and Sold Out Everything!"

"Made Over $5,000 in One Day – My 12-Hour TikTok LIVE Shop Experience"

"12 Hours on TikTok LIVE = My Best Sales Day Yet!"

If the results were surprising or disappointing:
"I Did a 12-Hour TikTok Shop LIVE and Barely Made Any Sales – Here's Why"

"The Truth About TikTok Shop LIVE: 12 Hours and Only 3 Orders?"

For YouTube/Blog-style content:
"Behind the Scenes of My 12-Hour TikTok Shop LIVE (Full Breakdown + Lessons Learned)"

"12 Hours. 1 Ring Light. Endless Energy. Here's What Happened on My TikTok Shop LIVE"