For the first florist you would do $12.50 divided by 4 as there are 2 flower bouquets and 2 vases = $3.125, which represents both b and v
As for the second florist you would do $29.00 divided by 10 as there are 8 flower bouquets and 2 vases. This results to $2.6, this represents the cost of one b and one v.