Concrete measurements

I ask you - how hard can it be . . . . . . really???
We have this strip on the drive that we did not concrete in at the time - mainly because we run of the necessary dough.
So now we think we have enough dolores saved, I rung up 5 contractors to take measurements and give us a firm price on costs and the results where astounding.
One just did not turn up for a start - the remaining four quoted as follows

$ 5378 --- 76.0 sq meter --- @ 1 sq meter = $ 70.60
$ 4405 --- 71.2 sq meter --- @ 1 sq meter = $ 61.88
$ 7671 --- 73.2 sq meter --- @ 1 sq meter = $ 104.8
$ 4331 --- 77.5 sq meter --- @ 1 sq meter = $ 56.25

I mean for a start the area is a nice straight rectangle - so u would expect the square meter figure to be closer together. And the all quoted the same concrete - / finish / placement / cut /etc etc

Guess it pays to shop around ^^

now - who will get the job??? ok - eeny meeny miny mo . . . . . .

:-)