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D2 Dynamic programming help in understand one bit

Direct link to the question- http://pmt.physicsandmathstutor.com/download/Maths/A-level/D2/Topic-Qs/Edexcel-Set-1/D2%20Dynamic%20Programming.pdf

On page 15 and 16

Heres the question-




Heres my working out in 2 pictures since 1st one isnt very clear on the edges











Heres the markscheme







I dont understand why in may their destination is always 2 :/
Original post by emprex

I dont understand why in may their destination is always 2 :/


Errors in the markscheme.

There are several errors for May, so here's my corrected version below - I've not checked the values.

Also in your working, you only need to consider the State=0 for May, as you're told there is nothing in storage at the start of the month.

2f46e878f1f71261f654754ecd17e305.png

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