Mathematics

Vocabulary for Volume
One stère is equal to one cubic metre.
The derivation is from  Greek στερεός stereos which means 'solid'.
Evidently, in 1793 France began to use this terminology as a metric equivalent to the cord which is used in Canada and USA.  A cord is equivalent to 3.62 m³. I can't understand that,  so ... we'll keep with the stère (pronounced stair) which is used for measuring large quantities of firewood or other cut wood, whilst the cubic metre is used for uncut wood.


Although my woodburner is still in use, mainly for mornings and evenings, or if the weather becomes more humid, I thought I would record the quantity of logs that I have burned since the Autumn when I began with 10 stères.  Now I have about 2½ stères in store so I have burned 7½ stères.
One stère cost me about 43 euros.  
43 x 7 = 301 + 22. 
Therefore, winter fuel has cost me about 323 euros. But wait!
Divide by 6 months = 53.8 euros per month, which is about 13.50 euros per week or 1.80 euros per day.
For budgetary purposes, it makes an average for the year of 26.90 euros per month or 6.72 per week or about 1 euro per day!
Add the cost of woodburner glass cleaner products, firelighters, matches, as well as the log splitter (a 200 euros investment that does a job I would not be able to do otherwise!)  Kindling wood has been free.  I inherited a lot of old wood but most of it needs to be sawn so I will have to pay someone to do that.  I also add the cost of a monthly newspaper I subscribe to as it is used for the fire once read!
Of course, it was a relatively mild winter apart from the 3 weeks of THEBIGFREEZE so the calculations cannot be applied to any other year.  As reported earlier it was not warm outside and not warm in my house!  I do NOT have central heating!  Me THINKS...I need to budget in the cost of the electricity bill  as there were many occasions especially in THEBIGFREEZE when I just had to get some extra warmth from a free-standing radiator,  even though I was wearing a coat, hat and scarves for most of the day and night!!!!!!

These figures indicate that I could order 10 stères for next winter but it would be better if I were to order 15 stères,  as I hope to run two woodburners in my L-shaped house next winter, and IF I am brave enough to give WinterinFrance another go I could burn more and be warmer at not much greater a cost. I was cautious and careful this year.  However, it may well be the case that my new source of oak logs will be more expensive and oh if the pensionable income goes down  a re-think may have to be made.  The beauty is that logs not burnt in any winter can be stored until the following winter.
At least, for me it has has been an interesting mathematical exercise!