A good letter, just a couple of missing articles and verb tense errors. Remember staff is uncountable. When using the word put in this letter you need to use the multi-word verb to be put somewhere. I have changed the word pantry to coffee area. This is because pantry is where you store cans, dry food etc, which you can walk into in a kitchen. The better words to use in this context is coffee area or lunch area. Some great sentences which were all correct.