Going by those prices, a parent and u12 can go in for £20, a good offer IMO. However they 'offer' a parent and u12 to get in for £22, which isn't much of an offer at all, only for those going in the Main stand, who would be £24 with those new prices.
The table heading also separates the stands by saying "Norrie McCathie, North West and South West",the south west is in the main stand, and then the Main Stand has a column of its own.