Returns the immediate prorated charge for renting one phone number from today through the end of the current billing cycle, plus the recurring monthly rate. Use this to show a "you'll be charged $X today" preview before calling POST /product/rent-number.

Returns 400 if the organization doesn't have the phone-numbers feature configured (contact support) or if the org is currently locked (e.g. unpaid invoices — call GET /product/unpaid-invoices first to check).

{
  "status": true,
  "data": {
    "immediateCharge": 5.3,
    "perNumberRecurringAmount": 10,
    "monthlyRate": 10,
    "prorationAmount": 5.3,
    "daysRemaining": 16,
    "daysInMonth": 30,
    "proratedValue": 0.53
  }
}