don't even try and tell me you never measured wrong, or ever screwed up the math. as for me, my measurements are dead nuts perfect, every time, always have been, until this week.....i screwed up 2 jobs in a row. the first job, was landscaping work. i OVER calculated by 2 yds of topsoil, and 2 yds of mulch. that's 4 YARDS, that i over charged him for @ $75 per yd. i overcharged by $300. the second job, was a sod job. i measured it at 1800 sq ft + 10% over for a total of 1980 sq ft @ $1.25 per sq and charged him $2475. i screwed THAT ONE up too. the actual sq footage was 2300 sq ft. the job should have been charged 2300 sq ft + 10% over= 2530 sq ft @ $1.25 per sq for a total of $3162.50. it's been a rough few weeks, and i don't know how i screwed up my math, but i did. how would you rectify both of these situations?