please solve it clearly.

A perpetuity pays 50. 1.56 dollars at the end of the k-th year for 1

A perpetuity pays 50 . 1.5k dollars at the end of the k-th year for 1 k 5 . and then pays 70 dollars per year at the end of the 6th year and later. The annual effective interest is 10%. Calculate the present value of the perpetuity. Round the answer to the nearest ten dollars.