Everyone in the village knew him, so we had _______ his house.

A．no difficulties to find

B．some difficulties in finding

C．no difficulty to find

D．no difficulty in finding

某公司计划年度的销售收入为780000元，固定成本总额为175000元，变动成本率为65%，则盈亏临界点销售额( )元。

A．500000

B．600000

C．700000

D．800000