Because of the nature of each column reflecting different records and other factors this is an awkward report. I would suggest a structure with 12 memo fields per record, and 1 record per item code. Then you could loop through the shipments constructing the memo field contents. I only suggest all of this because of the report payout, which really doesn;t fit with any of the limited pardigms of the VFP report writer.

CREATE CURSOR Output_ ;
( Code N(4), ItemName C(30), Month1 M, Month2 M, ... Month12 M)

APPEND FROM Master
USE Shipment IN 0 ORDER

PRIVATE lcMemo

SELECT Output_
SCAN
SELECT Shipment
SCAN FOR Code = Output_.Code && or SEEK, SCAN WHILE
lcMemo = "month" + LTRIM( STR( MONTH( ShipDate)))
SELECT Output_
REPLACE (lcMemo) WITH &lcMemo + ;
CTOD( ShipDate) + STR( Quantity) + CHR(13) + CHR(10)
.. or whatever formatting you want

SELECT Shipment
ENDSCAN

SELECT Output_
ENDSCAN

When done, you can just create a simple report from the Output_ cursor. To eliminate unshipped products, you could REPORT FORM ... FOR NOT EMPTY( Month1) OR NOT EMPTY( Month2) OR ...