Connor owns a pottery and craft store. The store does very well, with pottery division sales of $120,000 with variable costs of $90,000, and craft division sales of $80,000 with variable costs of $52,000. If Connor were to calculate the weighted-average contribution margin for the store, what would he find?

A : The weighted-average contribution margin for the store is 29%.

B : The weighted-average contribution margin for the store is 19%.

C : The weighted-average contribution margin for the store is 15%.

D : The weighted-average contribution margin for the store is 60%.