Total initial cost of shirts =15× GH₵4.00The same amount will be used to buy the shirts at the new price.Number of shirts =Cost per shirtAmountNumber of shirts =15×GH₵ 4.00}/{ {\GH\₵ 5.00}=3 × 4=12 \;\text " shirts "\; $Note: 5 divides itself once and 15,3 times.