The people on Coral Island buy only juice and cloth. The CPI basket contains the quantities bought in 2013​ (the reference base​ year).

  
The average household spent ​$60 on juice and ​$30 on cloth in 2013 when the price of juice was ​$2 a bottle and the price of cloth was ​$5 a yard.
  
In​ 2014, juice is ​$4 a bottle and cloth is ​$6 a yard.
Calculate the CPI and the inflation rate in 2014.

Thanks!!