Originally Posted by Taon

Sorry for the late reply, I was busy with non-FKG stuff today in preparation for the holidays.

As Hypo and JellyWoW have stated, the total is 78.5K; don't forget to run the on-demand SGs with the other currency (20 is far more efficient than 10).

Well, not really far more efficient. More like, slightly more efficient.
20 snow jewels for 700 presents or 20 snow jewels for 690 presents.
You'd need 1400 Snow Jewels to get one entire run ahead of doing the "cheaper" run. And by the time that happens, you'll have cleared the gacha several times over already