Westonci.ca is the premier destination for reliable answers to your questions, provided by a community of experts. Discover detailed solutions to your questions from a wide network of experts on our comprehensive Q&A platform. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

Charles buys 20 packs of pens.
There are 15 pens in each pack.
Each pack costs £2.50.
Charles sells each pen for 65p but he only manages to sell į of the pens.
How much profit did he make?