"Send that letter to thirty companies."

Translation: Pošli ten dopis třiceti firmám.

[Praha2017]

''Pošlete tamten dopis třiceti firmám'' should be accepted, I think.

[VladaFu]

It sounds a bit strange to call a letter you are going to send using "tamten".

But I added it.

[Tom_Ratiborsky]

It sounds strange, morelikely... pošlete tento dopis, anyway how big mistake is usage of the instead of this

[VladaFu]

the/that ... ten/tamten

this ... tento

Distinguished throughout this course.