Questão de Matemática e suas Tecnologias #01a0e94a

An engineering firm was hired to carry out a service valued at R$ 71,250.00. The firm's partners decided that 40% of this amount would be allocated to pay three engineers who managed the service. The payment to each of them will be made directly proportional to the total number of hours worked. The number of days and daily hours worked by each engineer were, respectively:

• engineer I: 4 days, working 5 and a half hours per day;
• engineer II: 5 days, working 4 hours per day;
• engineer III: 6 days, working 2 and a half hours per day.

What is the greatest difference, in reais, between the amounts received for this service between two of these engineers?