精打细算 [- dǎ xì suàn]be very careful in reckoning; accurate count; be accurate in calculation; budget strictly; careful and detailed [meticulous] calculation; careful calculation and strict budgeting; count every cent and make every cent count; cut it fine:
•¶ 他们增产的计划都是精打细算出来的。 Their plans for an increase have all been carefully calculated.