400 Bad Request

Try this:
{
  "records": [
    {
      "id": "${id}",
      "fields": {
        "Name": "${Name}",
        "Email": "${Email}",
        "Phone #": "${Phone}",
        "Date": "${Date}",
        "Time": "${Time}",
        "TotalBCs": "${TotalBCs}",
        "TotalBags": "${TotalBags}",
        "BagImages": [{"url": "${Photo}"}],
        "PickupLocation": "${Location}"
      }
    }
  ],"typecast": true
}

Do you have sure that this is right?
 "BagImages": [{"url": "${Photo}"}],

if the error persist, remove this line and try again.
 "BagImages": [{"url": "${Photo}"}],

I still get an error

{
  "error": {
    "type": "INVALID_VALUE_FOR_COLUMN",
    "message": "Field \"TotalBCs\" cannot accept the provided value"
  }
}

"BagImages": [{"url": "${Photo}"}], is fine, this is not what is giving me the problem. The field that requires an integer is causing an issue.

Dies the TotalBCs column on airtable is set to a # (number field) or a lookup, formula, or othe?

Hi Valter,

For some weird reason after recreating my table using "typecast": true
finally worked for me with no errors. Thanks for your help.

I'm not sure why this isn't in any of Bravo's help Document, but for those who are having issues creating POST Requests please read Airtable API Documentation. This is what I found after Valter's help:

"The Airtable API will perform best-effort automatic data conversion from string values if the typecast parameter is passed in (click to hide example). Automatic conversion is disabled by default to ensure data integrity, but it may be helpful for integrating with 3rd party data sources." - Airtable