More tests needed, preferably random tests.

Once again, apologies. I had a slight error in my solution which I have now altered, and it should work now?

The test block name is the default one: returns correct ages for different lists

This happens in both sample test and actual test.

I don't think the numbers match up even in the example:

Day 2:

(barrel is at 41.666 miles)

barrel moved 36.111 miles, barrel position 77.777 miles

total distance camel travelled: 238.888

The total energy spent is 41.666*0.4 + 36.111*2 + 77.777*0.4 = 120.

Sorry, fixed that! Also made a slight adjustment to the problem, so that the camel must also return home after delivering the barrel :)

There's a typo in the sample test: 3rd test case should be assigned to results3.