Alexi spends more time in the production of tacos and Tony spends more time in the production of Cuban sandwiches. So they enjoy comparative advantage in the production of these goods respectively.
Answer: Alexi earns $4200 and Tony earns $6300. Collectively they earn $10500 per week.
Explanation:
The opportunity cost of Alexi for producing one Taco is 0.67 cuban sandwiches.
The opportunity cost of Tony for producing one cuban sandwich is 1.29 tacos.
Tony has a comparative advantage in the production of cuban sandwiches.
Alexi has a comparative advantage in the production of street tacos.
Combined together they will produce a total of 1410 tacos and 1530 cuban sandwiches.
Alexi will spend 20 hours in the production of tacos and Tony will spend 20 hours in the production of cuban sandwiches.
Tony will specialize in cuban sandwiches and will earn $ 6300 and Alexi will specialise in producing tacos and will earn $ 4200.
Their joint revenue will be $10500 per week.