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Answer:
a) CP = SP/1.1
b) CP = $59.50
c) GST = $5.95
Explanation:
a) Divide by the coefficient of CP.
SP = 1.1×CP
CP = SP/1.1
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b) Use the formula with the given value.
CP = $65.45/1.1 = $59.50
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c) You can do this two ways: subtract CP from SP, or multiply CP by 0.1.
GST = SP -CP = $65.45 -59.50 = $5.95
GST = CP×0.10 = $59.50 × 0.10 = $5.95