Figure: Upperia's Production and Consumption (Figure: Upperia's Production and Consumption)

Figure: Upperia's Production and Consumption (Figure: Upperia's Production and Consumption) The graph shows
Upperia's international trading pattern.Point P is production with trade,
And point C is consumption with trade.Assume that the marginal product
Of labor in producing shoes is one pair per hour.How many hours of
Labor occur in Upperia?

A) 125
B) 100
C) 80
D) 65