IBM intern

IBM Intern coding 求解, 給大米如附件
輸入：
2016-04-01,4,pies

2016-04-01,6,pies
2016-04-01,2,cakes
2016-04-01,12,cookies
2016-04-02,7,pumpkins
2016-04-02,2,peaches
2016-04-03,6,apples
2016-04-03,23,pies
2016-04-03,4,cookies
2016-04-03,9,peaches

輸出：
2016-04-01, 24,8.00,3
2016-04-02,9,4.50,2
2016-04-03,42,10.50,4

急