R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> x <- c(59400,57200,60500,48400,62700,61600,66000,68200,75900,66000,62700,78100,66000,49500,58300,44000,61600,50600,67100,60500,63800,71500,70400,83600,60500,50600,56100,40700,58300,45100,63800,60500,53900,77000,69300,79200,59400,55000,49500,40700,53900,48400,66000,63800,55000,73700,68200,88000,70400,42900,42900,42900,50600,50600,68200,62700,56100,70400,64900,93500,73700,42900,45100,37400,51700,59400,74800,73700,59400,69300,61600,88000,67100,53900,48400,36300,53900,64900,75900,71500,52800,75900,59400,91300,75900,55000,50600,34100,53900,51700,78100,78100,59400,77000,57200,89100,75900,56100,42900,29700,58300,56100,73700,84700,62700,70400,52800,91300)
> par4 = '12'
> par3 = 'verkochte exemplaren van 'De morgen' tussen jan/06 tot dec/14'
Error: unexpected symbol in "par3 = 'verkochte exemplaren van 'De"
Execution halted