Natalie had some shirt and skirts in her shop. The number of shirts she had was $$36$$ less than the number of skirts. After selling $\frac{2}{3}$ of her shirts and $$\frac{5}{6}$$ of her skirts, she had $$72$$ shirts and skirts left in total. How many skirts did she have at first?~\uline{~~~~~~~~~~}~ 
Overseas Competition->Knowledge Point->Calculation Modules