Excel Solver Constraint Help

I've got a fairly easy question for Excel experts that im having some trouble wrapping my head around..

I have a 6 month production schedule (month by month) optimized to minimize total costs,
The current constraints include,
On_hand_after_production>= Demand
Ending_Inventory<=Storage_Capacity
Units_Produced<=Production_Capacity

I need to alter or add (im not sure what) a constraint so that except for month 6, demand does not need to be met on time. Meaning all demand must be eventually met by month 6...

Wut do ?

I have screenshots that can be posted in order to make it more visual if necessary

Thanks !

PigskinProductionPlanning.xlsx


Thank you for the welcome and I apologize for not posting the workbook originally...

Oh I see...So i added a column that summed up the totals for production and for demand and set them as the constraints....its seems to be the right answer. Thank you!

Thats the answer I got when I put those numbers in as well so that must be correct thank you!

What if I needed to do it month by month? Meaning That demand in any of the first 5 months must be met no later than a month late, and demand in month 6 must be met on time.