Poshmark sales and expenses

For Poshmark, I have all the data but it's really hard to figure out where to put it.   It should be straightforward.   I'm a seller of things i have and things i have resold.   Where do I put these items?

 

1) 1099 K box 1a   $25,266

2)  Amount of cancellations/refunds $2,562    (total gross should be $22,684)

3)  Net income after posh fees   $18,124

4)  Cost basis (cost into sold items) for 2024 items   $16,024  (therefore I had a profit of $2,100)

5)   All expenses - supplies, miles, boxes, shipping, home office, internet, phone, bank fees)  totalling $5,215. 

 

This is a loss of $3,125.

 

Thank you if someone could figure this out.  This should be common to Poshmark sellers.