Wikipedia:Reference desk/Archives/Mathematics/2018 January 14

= January 14 =

Calendar
Week before and after the 30th day of a month. Please specify the correct dates please. 37.111.234.166 (talk) 16:28, 14 January 2018 (UTC)


 * Your question is unclear. --70.29.13.251 (talk) 20:52, 14 January 2018 (UTC)


 * Target the 30th date of one month. what date is the week before and the week after. My calculation is 16th or 23rd (before) and 6th or 13th. 119.30.38.208 (talk) 16:36, 15 January 2018 (UTC)


 * You can analytically continue each month in terms of the next and previous months. In case of August you define the 32nd of August to be the 1st of September and in general x August = (x - 31) September and similarly for other month. Count Iblis (talk) 16:43, 15 January 2018 (UTC)

Product price mark-up
A product cost £10 to buy. It consist of the all the investments implemented before customer received at hand after purchase.

The tax percentage is, say for example 20%.

1) Do you tax 20% of the £10, or do you exclude the investment (say £5) and then tax the profit sum?

37.111.234.166 (talk) 16:30, 14 January 2018 (UTC)


 * See Value-added tax for the European system.  Dbfirs  21:35, 14 January 2018 (UTC)

Chart ideas for The World's Billionaires
Might there be a nice chart layout for The World's Billionaires that shows years and people and new heights? If you can think of a clever presentation, please suggest it at Talk:The World's Billionaires/Archives/ 2.

Many thanks. Anna Frodesiak (talk) 21:32, 14 January 2018 (UTC)