1 kg Taurine Powder

Today I picked up the taurine powder for my cat from the Packstation and I just realized I had ordered 1 kg instead of 100 g. Now I'm able to provide taurine for at least 4000 days. I hope she will see sunrise of on the day 4000. After this calculation, I began to wonder in which pigeonhole has got me this internet order. I don't suppose the algos fit together taurine and cat at least not 1kg taurin and one cat.(?)

A Packstation is a machine. The main feature is the to pickup of parcels for people who are usually not at home when the parcel delivery service  arrives, and So, therefore please chose beforehand to have the parcels delivered to the pickup machine

I gotta say this is pretty good! The only setence that didn't make sense was the last one in the first paragrah. Hopefully some one can correct that.

URGENT!!! some phrases to correct...

Would someone be so kind to corect and improve the following phrases?

A: Aha ok, someone  body else is here. Now I would like to know whether if you are the only person in your department who is entitled to conduct these sort of procedures, Unless,  you have other colleagues that can handle such operations?
B: I used to work alone until half a year ago, the first of October to be precise, a junior employee was hired o support to assist me. She has various tasks to accomplish, but for the most part she assists  helps me.
A: Sorry to interrupt you, but did I understand it  that correctly? She commences activity now?  does she?
B: No. She commenced operations half a year ago.

This is the best I can do to help you. I'm not a grammar wizzard or business man, but I think I could point out some errors here. If anyone would like to correct the *corrections* I made, then go right ahead.