I have no idea what a "soda clip" is; I'm not even certain what you're asking ... but never let it be said that my ignorance prevents me from attempting an answer ...
If 10 soda clips is 2,8 g then 1 soda clip is 0,28 g.
3.620 kg will be 3.620 kg x 1000 g / kg = 3620 g
3620 g ÷ 0,28 g = 12.929 (approximately)
(I'm also assuming that you write twelve thousand as 12.000 and three hundredths as 0,03.)