Damian H's percent scibe

Hello if anyone reads this my job was to make a scribe about 3 question from pages 148-153 or I would fail grade 8 math.

I picked question 4, 10, and 13 on page 148-149.
{Q4} The question is find the total cost including 5% GST and 7% PST on

• 2 Binders at $4.99 each
• 1 Math set for $3.99 
• A backpack for $19.99

To find the answer I added tax on all the items individually then added all the items+ tax on each item together which gave me the answer $38.04.

• 2 Binders at $4.99 each x 1.12(tax) = $5.5888

+

• 1 Math set for $3.99 x 1.12(tax) = $4.4688

+

• A backpack for $19.99 x 1.12(tax) = $22.3888

                                                                                             
=                                       $38.04

  

                                         $5.5888

                                              +

                                         $4.4688

                                              +

                                       $22.3888

                                                                                               

                                           $38.04