Anomaly detection using fast.ai

Hi all,
I am wanting to go deep into fastai v2 and have a mini project at hand. Need the community’s help to get me started, please. The dataset consists of invoices and I want to use a NN to flag anomalous invoices. A single invoice looks like below:
[

 "skuCode1": {"pricePerUnit": "float", "deliverBy": "date object", "receiver": "string", 
 "supplier": "string", "quantity": "float", "itemName": "string", "lineItemNo": "number", 
 "paymentAmount": "float", "approvedAmount": "float", "paidAmount": "float"},

"skuCode2": {"pricePerUnit": "float", "deliverBy": "date object", "receiver": "string", 
"supplier": "string", "quantity": "float", "itemName": "string", "lineItemNo": "number", 
"paymentAmount": "float", "approvedAmount": "float", "paidAmount": "float"}

]

Thank you!

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