What is the meaning of 1, 1F, and 1T in Apple product type identifier in sales report?

Hello, I'm a completely new user of Apple's sales & trends report. Could someone here help me explain the meaning of 1, 1F, and 1T in the product type identifier? Can I use them to know the number of my iOS app downloads? Thank you for your help!

What is the meaning of 1, 1F, and 1T in Apple product type identifier in sales report?
 
 
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