How to calculate returns?

Hi, I have an example here is it correct calculated?

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• Product Price on Amazon: 22,99€
• Product Costs (Manufacturing + Shipping to Amazon): 5,64€
• VAT: 3,67€
• Amazon Fees (15%): 3,45€
• Amazon Shipping to customer: 3,32€
• Amazon Storage Fee: 0,08€
• Returns: (Sold 246, got 31 returns): 1,20€
• Ads: 0€

Profit = 5,63€ / 24,49%

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I am not sure if I have calculated the returns right? I have calculated so:

• (Manufacturing + Shipping to Amazon): 5,64€
• + Amazon Shipping costs: 3,32
• + Amazon Storage Fee: 0,08€
• + Amazon return fee: ~ 0,50€
• Total cost per refund: 9,54€ / 31 from 246 are 12,6% and 12,6% from 9,54€ are 1,2€

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So in total for 246 sold units:

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• 5655,54€ revenue
• – 5,64*246 = 1387,44€ Product Costs (Manufacturing + Shipping to Amazon):
• – 3,67*246 = 902,82€ VAT
• – 9,54*31 = 295,74€ Refunds
• 3,45+3,32+0,08 = 6,85*246 = 1648,20€ total Amazon Fees
• = 1421,34€ / 25,12%

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Is my calculation correct? Or am I missing something