the South Africa have to give up to make one DVD it's not too tricky divide forty by eight which gives us five soap for each DVD we produce we could have grown five bags of wheat in other words each DVD we make cost South Africa five bags of wheat now over in Japan if they choose to produce for DVD's the company's any wheat because their limited resources and if they focus on just producing the a bag suite there's nothing left the DVD production doing the maths a divided by four we can see that it will cost Japan to baghdad wheat to make one DVD soap comparing the cost to production in both countries South Africa has to give up five bags of wheat for each DVD it makes while in Japan it only cost to back sweet to make one DVD