conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: A shopping center sells T-shirts at $8 each, a sweater at $18,  and a jacket at $80. The jacket is on sale with a 10% discount. The sales tax is 5%.  Kevin wants to buy six T-shirts, four sweaters, and five jackets for his children. How much does Kevin have to pay for all the items, including the sales tax?
conversations.from: assistant
conversations.value: The six T-shirts cost 6 x $8 = $48.
  The four sweaters cost 4 x $18 = $72.
  And five jackets normally cost 5 x $80 = $400.
  So, a discount of 10/100 x $400 = $40 for the five jackets.
  Thus, the selling price of the five jackets is $400 - $40 = $360.
  Hence, the total cost of all the items is $48 + $72 + $360 = $480.
  The sales tax is equal to 5/100 x $480 = $24.
  Therefore, Kevin has to pay $480 + $24 = $504. including the sales tax.