is this these sentence okay?
Hi
I want to right a letter to a company, which has asked me explain the skills I learnt in high school.
I would really appropriate it if you would tell me weather these sentence are correct and give me some suggestions in this case
the sentences:
Acquiring calculation principle for conductor sizing.
Familiarity with the various type of electric pipes

Question

is this these sentence okay?
Hi 
I want to right a letter to a company, which has asked me explain the skills I learnt in high school.
I would really appropriate it if you would tell me weather these sentence are correct and give me some suggestions in this case 
the sentences: 
Acquiring calculation principle for conductor sizing.
Familiarity with the various type of electric pipes

Answer

Hi 
I want to write a letter to a company, which has asked me to explain the skills I learnt in high school.

I would be very pleased if you told me if these sentence are correct and gave me some suggestions in this case 
the sentences: 
Acquiring calculation principles for conductor sizing.
Familiarity with various type of electric pipes

Answer

Thank you Tutor Zowee

Answer

Hi! You need 'principleS' - then it's okay, and 'types' - then it's also okay!
Also Lorenzo is right - write a letter and 'whether these sentences'. Good work! Tutor Zowee :)