Accounting please give me the answers

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense