How do you find the cost after the sales tax is applied given Cost: $80; Sales Tax: 6%?

1 Answer
smendyka
Nov 21, 2016

The cost after the sales tax is applied is $84.80

Explanation:

The formula for calculating the Total Cost is:

#T = c + s*c# Where #T# is the total cost, #c# is the cost of the product and #s# is the sales tax percent. For this problem we are give the cost of the product (#c = $80#) and the sales tax percent (#s = 6%#). We can substitute these into the formula and solve for #T#:

#T = $80 + (6% * $80)#

"Percent" or "%" means "out of 100" or "per 100", Therefore 6% can be written as #6/100# which gives us the equation:

#T = $80 + ((6/100)*$80)#

Solving this gives:

#T = $80 + (($480)/100)#

#T = $80 + $4.80#

#T = $84.80#

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