Please check these sentences, thank you :) (not long)

Due to the nature of the Korean stone quarrying industry, promissory notes are settled within 100 days. tTherefore, the settlement day for the bill we generally receive is 100 days after drawing.


He used to worked as an agency staff in this company for 10 years, and has made a steady trade with us.

There have been steady transactions between us, and the sales have increased as well.

There hasve not been any problems in collecting bills so far.

The Sstone quarrying industry is booming these days.

The topic isn't in my knowledge domain, so I can only look at the grammar :)

Please check these sentences, thank you :) (not long)

Due to the nature of Korean stone quarrying industry, promissory notes are settled in 100 days therefore, the settlement day for the bills we generally receive is 100 days after drawing.


He used worked as agency staff in this company for 10 years and has made a steady trade with us.

There have been steady transactions between us and the sales have increased as well.

There have not been any problems in collecting bills so far.

Stone quarrying industry is booming these days.