Do you usually pay using cash or card? Please explain your answer.

I usually pay using card. Because, carrying card is easier than carrying some amount of money. Sometimes I use government pay application of the smartphone. Because, I could get a discount with the application only in some shops. --> I normally pay with a credit card. Since carrying a card is more convenient than carrying cash. I occasionally use the government pay service on my mobile. Since I could only get a discount with the app in a few stores. 

If the sales shows good signs, we will order more.  --> We will order more if sales prove promising. => Another way: Your sentence is okay and this is another way of saying it.

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We need the detailed information regarding the letter of credit and the product.  --> We need a letter of credit and detailed information on the product.  => Another way: Your sentence is okay and this is another way of saying it.

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We need your company’s business license, stock lists and the copy of your company’s proposal. --> We need copies of your business license stock quotes and proposal.  => Another way: Your sentence is okay and this is another way of saying it.

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