ABC分析
sales_info = [
{"name" => "商品1", "revenue" => 2400000},
{"name" => "商品2", "revenue" => 1200000},
{"name" => "商品3", "revenue" => 1000000},
{"name" => "商品4", "revenue" => 600000},
{"name" => "商品5", "revenue" => 270000},
]
sale = Num4SaleAnaLib::SalesAnaLib.new
sale.abcana(sales_info)