target costing

I got a bit confused about the way they have answered!

question from Kaplan mock
Theo Co is a business which grows through diversification and is currently considering expansion into manufacturing clothing which will be sold to companies who will sell the items under their own brand name. The first two clothing products Theo Co will manufacture are dresses and skirts.

Theo Co normally uses a pricing policy of a 10% mark-up on standard prime cost on its products. However, as the clothing market is highly competitive, the finance director is considering using a target costing approach but wants to retain the same mark-up.

Dresses

The maximum price the market will support is $22 per unit. 60% of the direct cost of each dress is expected to be cotton.

Skirts

40% of the direct cost of each skirt is expected to be wool. The minimum price Theo Co can source the wool necessary to make one skirt is currently $4.36 which has been built into the budget. On this basis, Theo Co has determined that the cost gap between the budgeted cost per skirt and the target cost per skirt is $0.45.

Assuming that target costing principles are adopted, what is the maximum selling price that Theo Co can charge per skirt? (to two decimal places)

$ 11.5
budgeted costs – $ 10.9
cost gap – ($0.45)
hence the target cost – $ 10.45
adding the markup of 10%
selling price – 11.5

I don’t get the point of budgeted costs here please help me out sir!
thanks in advance