



 
Anne, The total tax is 12% so if you knew the price before tax then
Turning that backwards then
so
Hence the tax was $15.81  $14.12 = $1.69. The GST is then 5/12 × $1.69 = $0.70 and the PST is $1.69  0.71 = $0.99. I hope this helps,  


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