Please help me Solve the question of duty Please use the computer for the solution

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Exercise N3 SIGMA company produces coats, cost of raw material per unit is 75 SAR, the labor cost of production per unit is 105 SAR, fixed cost for a month is 30.000 SAR, variable overhead cost per unit is 15 SAR. The total Production done by the company in one month is 500 coats. Required 1) Calculate Total variable cost and the variable cost per unit. 2) Calculate the Total cost and total cost per unit 3) Calculate BEP in Units and in Dollars using Graphical Method knowing that unit selling price is 245 SAR 4) Calculate BEP in Units and in Dollars using Equation Method knowing that unit selling price is 225 SAR 5) Calculate BEP in Units and in Dollars using Contribution Margin Method knowing that unit selling price is 295 SAR 6) What must be the unit selling price that 500 coats be BEP in Units? The sales manager suggested reducing the selling price founded by 10%, what will be the new BEP in Units