Source: https://oxfordbusinessgroup.com/interview/greater-accountability-obg-talks-kemi-adeosun-minister-finance Kemi Adeosun interview with oxford business group.
Quotes about pricing
page 14

Source: " Dolly Parton Delivers Commencement Address at the University of Tennessee 2009 https://www.youtube.com/watch?v=EuOm2lLIOoU&t=6m35s" (at 6m35s), University of Tennessee, Knoxville on YouTube.

“'Tis a world
Where all is bought, and nothing's worth the price.”
Source: Fortunatus the Pessimist (1892), Fortunatus in Act I, sc. ii; p. 17.

Source: The Path to Home (1919), p.143 - A Good Name, stanzas 1 and 2.

The Unpleasant Profession of Jonathan Hoag (p. 261)
Short fiction, The Fantasies of Robert A. Heinlein (1999)

Question http://hansard.millbanksystems.com/commons/1974/feb/06/industrial-and-economic-situation#column_1232 to the Chancellor of the Exchequer Anthony Barber in the House of Commons (6 February 1974)
1970s