I think I've worked this all out correctly. I have the 2 x Multiplier for my Dragon Insignia MB.

Check-in - 1 x 2 = 2XP

Write Product Review - - 250XP x 2 = 500XP

Welcome newbies in "Noticing Newbies"  :
"Re: Re: Hello from Germany"  
"Re: Re: Experienced Writer But New Here - Hello"  
"Feb. 5 ~ Healing"  
"Re: Re: Check out my portfolio"  
"Re: Re: Happy to be here:)"   - 5 x 15 x 2 = 150

Write a review of "WDC Dragon Vale"  - 10 x 2 = 20XP

Wrote an entry for: "Invalid Item"  - "Feb. 4 Entry"   - 10 x 2 = 20XP

Create a blog entry: "Feb. 4 - Stroke"  - 15 x 2 = 30XP

Create a poem in a blog entry - "Feb. 5 ~ Healing"  15 x 2 + 30XP

Sent 6 merit badges to fellow Dragon Tamers: BIG BAD WOLF Happy July 4th! Channie- Is now Sabrina Mousethyme Jeff Lilli 🧿 ☕ Massive Friendly Derg

6 x 15XP = 90 x 2 = 180XP

TOTAL = 932XP