A team of miners planned to mine 1800 tons of ore during a certain no. Of days. Due to technical difficulties in one-third of the planned no. Of days, the team was able to achieve an output of 20 tons of ore less than the planned output. To make up for this, team overachieved for the rest of the days by 20 tons. End result was that the team completed the task one day ahead of time. How many tons of ore did the team initially plan to ore per day?