You should read the lines of the file to do the computation. You should compute

and print $3$ things:

$(1)$ What's the amount of Dogecoin you held on $8/1$ before selling?

$(2)$ How much $ did you have after selling all your Dogecoin on $8/1?$

$(3)$ Use this formula to compute and print your rate of return:

rate of return $=($final$\_$investment$\_$value $-$ total$\_$cost$)/$total$\_$cost