function "Plus positive"

Plus Positive function to cut off negative numbers.
5 + 2 = 7
5 + -2 = 5
Made to take into account shortcomings (for example, according to the plan there were 5 deals, but they did 3, 2 in the remainder) so that processing (they did 7 with a plan of 5) was not taken into account in this algorithm.
For example:
overfulfillment of the plan according to Responsible1 (negative value) will not be shown in the diagram.