Vusi Vending Machines purchased its first cupcake vending machine for R50 000 and placed it in the foyer of Regenesys Business School on the 1 March 2022. On 28 February 2023 (12 months later), the market value of the cupcake vending machine was R54 750. During this time, the machine generated after-tax cash receipts of R5 000. Calculate the annual rate of return (r) of Vusi's vending machine.