IF YOU ARE GOOD AT RATIOS PLEASE HELP Tenielle's netball team need new t shirts, which cost 27.50 each. With supplier A, she can pay for 2 and get 1 free, with supplier B she gets a 20% discount on every shirt if she buys more than 20 and supplier C gives 3 free shirts for every 5 sold. Teneille needs 26 shirts. Who has the best deal? Show full working out

Thank you in advance :)