Recent postal rates for non-standard and oversized letter mail within Canada are given in the following table. Maximum dimensions for this type of letter mail are 380 mm by 270 mm by 20 mm. Between 100 g 100 g or less and 200 g $1.10 $1.86 Between 200 g and 500 g $2.55 Draw a graph of the cost, in dollars, to mail a non-standard envelope as a function of its mass in grams. Where are the discontinuities of this function?

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