Uds. cortas a su abuela cada mrs. (mandar)

This sentence should be:
Ustedes mandan cartas a su abuela cada mes.

Translation:
You(formal) send letters to your grandma each month.

Ustedes- you(formal)
Mandan-send
Cartas- letters/cards
A su- to your
Abuela- grandma
Cada- each
Mes- month

The sentence you provided was grammatically incorrect since cortas means to cut and Mrs. is used to introduce a married woman which should have been mes which means month.

Hope this helps! :3

Trust me when i say this. type everything that you want in your paragraph into google and you’ll get what your looking for. i’ve done this many of times and it works. trust m lol

The answer is dolieron.