The calculation of sales tax is very easy as it involves very simple concept of percentage.
The government of every country needs money the following:
(i) to meet their administrative expenses,
(ii) to execute social welfare and development schemes,
(ii) to meet the expenses on salaries of its employees, etc.
One of the many sources of collecting money (revenue) by the government from the citizen on the sale of goods within their respective territories. This purpose is known as sales tax.
It is levied by a government on the sale of different commodity. The sales tax is the sum of money a buyer pays over and above the price of a commodity to buy it.
The rates of tax on purchase of different commodities within
a country are different. Also, the rates of tax on the same commodity in
different country are different. Some commodities may be be exempted from sales
tax by a government. Sales tax is one of the many forms of indirect taxes that
a government imposes on its citizens.
If P be the printed price or marked price of a commodity, the rate of sales tax be r% and S be the selling price (i.e., the price a customer has to pay) then
S = P(1 + \(\frac{r}{100}\)) and sales tax = S - P = \(\frac{Pr}{100}\)
Solved examples on relation between printed price, rate of sales tax and selling price:
1. The printed price of a bi-cycle is $ 4200. The rate of sales tax on it is 10%. Find the price at which the cycle can be purchased.
Solution:
Here, the printed price P = $ 4200, the rate of sales tax = 10%, i.e. r = 10
Therefore, the selling price S = P(1 + \(\frac{r}{100}\))
= $ 4200 × (1 + \(\frac{10}{100}\))
= $ 4200 × \(\frac{11}{10}\)
= $ 4620
Therefore, the cycle can be purchased for $ 4620.
3. Mason purchased a pair of shoes costing $ 850. Calculate the total amount to be paid by him, if the rate of Sales Tax is 6%.
Solution:
The sale price of shoes = $ 850
and, the sales tax = 6 % of $ 850 = $ 51
Therefore, the total amount to be paid by Rohit = $ 850 + $ 51 = $ 901
4. John bought a printing machine for $5136, which includes sales tax. If the listed price of the printing machine is $ 4800, what was the rate of sales tax?
Solution:
Here, the printed price (or listed price) P = $ 4800, the selling price S = $ 5136.
If the rate of sales tax be r% then,
S = P(1 + \(\frac{r}{100}\))
⟹ $ 5136 = $ 4800(1 + \(\frac{r}{100}\))
⟹ 1 + \(\frac{r}{100}\) = \(\frac{5136}{4800}\)
Therefore, \(\frac{r}{100}\) = \(\frac{5136}{4800}\) - 1
⟹ \(\frac{r}{100}\) = \(\frac{336}{4800}\)
⟹ r = \(\frac{336}{48}\)
⟹ r = 7.
Therefore, the rate of sales tax was 7%.
5. Jacob purchased an article for $ 702 including Sales Tax. If the rate of Sales Tax is 8%, find the sale price of the article.
Solution:
Let the sale price of the article be $ x
Therefore, x + 8% of x = $ 702
⟹ x + \(\frac{8x}{100}\) = $ 702
⟹ \(\frac{108x}{100}\) = $ 702
⟹ x = $ 702 × \(\frac{100}{108}\)
⟹ x = $ 650
Therefore, sale price of the article = $ 650
6. Find the marked price of a motorbike which is bought at $ 36300 after paying a sales tax at the rate of 10%.
Solution:
Here, the marked price or listed price P, the selling price S = $ 36300 and the rate of sales tax = 10%, i.e. r = 10
S = P(1 + \(\frac{r}{100}\))
⟹ $ 36300 = P(1 + \(\frac{10}{100}\))
⟹ P × \(\frac{11}{10}\) = $ 36300
⟹ P = $ 36300 × \(\frac{10}{11}\)
⟹ P = $ 3300 × 10
⟹ P = $ 33000
Therefore, the marked price is $ 33000.
4. A refrigerator is marked for sale at $ 17600 inclusive of sales tax at the rate of 10%. Calculate the sales tax on the refrigerator.
Solution:
Let the price of the refrigerator without sales tax = P.
Here, the selling price S = $ 17600 and the rate of sales tax i.e., r = 10
S = P(1 + \(\frac{r}{100}\))
⟹ $ 17600 = P(1 + \(\frac{10}{100}\))
⟹ P ∙ \(\frac{11}{10}\) = $ 17,600
Therefore, P = $17,600 × \(\frac{11}{10}\) = $ 16,00 × 10 = $ 16,000
Therefore, the sale tax = Selling price - Printed price
= $ 17,600 - $ 16,000
= $ 1,600
5. If the rate of sale tax increases by 55, the selling price of an article goes up by $ 40. Find the marked price of the article.
Solution:
Let the marked price = P(1 + \(\frac{r}{100}\))
When the rate of sales tax increases by 5%,
the selling price = p(1 + \(\frac{r + 5}{100}\))
From the equation, P(1 + \(\frac{r + 5}{100}\)) – P(1 + \(\frac{r}{100}\)) = $ 40
⟹ \(\frac{5P}{100}\) = $ 40
⟹ P = $ 40 × 20 = $ 800
Therefore, the marked price of the article is $ 800.
● Sales Tax and Value Added Tax
10th Grade Math
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