What do you mean by Break-Even Point? Show it graphically.

ABC company's projected information is as follows :

You are requested to :

(i) Compute the Break-Even point in units.
(ii) How many units must be sold to earn a profit of Taka 30,000?
(iii) Compute the Contribution Margin and Contribution Margin Ratio.
(iv) Compute the additional profit that ABC would earn if the sales were Taka 25,000 more.