AP Payable Invoices and Purchase Orders PO Details Query in R12

SELECT a.org_id "ORG ID", e.vendor_name "VENDOR NAME"
      ,UPPER (e.vendor_type_lookup_code) "VENDOR TYPE"
      ,f.vendor_site_code "VENDOR SITE", f.address_line1 "ADDRESS"
      ,f.city "CITY", f.country "COUNTRY"
      ,TO_CHAR (TRUNC (d.creation_date)) "PO DATE", d.segment1 "PO NUMBER"
      ,d.type_lookup_code "PO TYPE", c.quantity_ordered "QTY ORDERED"
      ,c.quantity_cancelled "QTY CANCALLED"
      ,g.item_description "ITEM DESCRIPTION", g.unit_price "UNIT PRICE"
      ,   (NVL (c.quantity_ordered, 0) - NVL (c.quantity_cancelled, 0)
          )
        * NVL (g.unit_price, 0) "PO Line Amount"
      , (SELECT DECODE (ph.approved_flag, 'Y', 'Approved')
           FROM po.po_headers_all ph
          WHERE ph.po_header_id = d.po_header_id) "PO STATUS"
      ,a.invoice_type_lookup_code "INVOICE TYPE"
      ,a.invoice_amount "INVOICE AMOUNT"
      ,TO_CHAR (TRUNC (a.invoice_date)) "INVOICE DATE"
      ,a.invoice_num "INVOICE NUMBER"
      , (SELECT DECODE (x.match_status_flag
                       ,'A', 'Approved'
                       )
           FROM ap.ap_invoice_distributions_all x
          WHERE x.invoice_distribution_id = b.invoice_distribution_id)
                                                          "Invoice Approved?"
      ,a.amount_paid, h.amount, i.check_number "CHEQUE NUMBER"
      ,TO_CHAR (TRUNC (i.check_date)) "PAYMENT DATE"
  FROM ap.ap_invoices_all a
      ,ap.ap_invoice_distributions_all b
      ,po.po_distributions_all c
      ,po.po_headers_all d
      ,ap.ap_suppliers e
      ,ap.ap_supplier_sites_all f
      ,po.po_lines_all g
      ,ap.ap_invoice_payments_all h
      ,ap.ap_checks_all i
 WHERE a.invoice_id = b.invoice_id
   AND b.po_distribution_id = c.po_distribution_id(+)
   AND c.po_header_id = d.po_header_id(+)
   AND e.vendor_id(+) = d.vendor_id
   AND f.vendor_site_id(+) = d.vendor_site_id
   AND d.po_header_id = g.po_header_id
   AND c.po_line_id = g.po_line_id
   AND a.invoice_id = h.invoice_id
   AND h.check_id = i.check_id
   AND f.vendor_site_id = i.vendor_site_id
   AND c.po_header_id IS NOT NULL
   AND a.payment_status_flag = 'Y'
   AND d.type_lookup_code != 'BLANKET';