fix bug 1,2,3,7,9

[X]1. Problem with Inventory Report (mismatch between old version and
the new one)
[X]2. Operating Profit Margin in Profitability Evolution does not match
with the old version
[X]3. Additional Retailer Margin in Profitability Evolution does not
match with the old version
[X]7. Market Trends - Total Inventory at Trade (mln std. packs) is
different from old version, exactly double or half
[X]9. Difference in budget per period in new version and old version.
It should be divided by 6 instead of 7
fix bug 1,2,3,7,9
fix production cost problem
Merge branch 'haosun'