Sara sells two types of cakes from home. The total fixed cost for every month is budgeted at 200 BD. The labor cost per unit is equal to 2 BD. Sara sells 150 cake every month. The selling prices is 15 BD. The ingredient cost is 4 BD per cake. Sara wants to know what price she must charge to generate enough revenue to cover her costs. With Break-Even Analysis, Sara can compare different pricing options and calculate how many units sold will lead to profitability. She needs to calculate the contribution margin which equal to selling price minus the variable costs. Contribution margin shows the revenue earned per unit, after deducting variable costs and needs to be enough to cover the company's fixed costs. Sara needs to calculate the following:

1) Break-Even Price, to determine the price needs to be set to generate enough revenue to cover her costs. Break-Even Price equal to 1 / ((1 - Total Variable Costs Percent per Unit) * (Total Fixed Costs per Unit)). Where Variable Costs Percent per Unit = Total Variable Costs / (Total Variable + Total Fixed Costs). Then determine how changes in unit sold and cost per unit affect Break-Even Price, unit sold between 100 and 200 in 10 increments and Cost per unit between 3.5 and 6.5 in 0.5 increments.

2) Break-Even Units Sold, to determine the number of units that need to be sold to achieve the break-even point. To calculate the Break-Even Units Sold, we divide the total fixed costs by the contribution margin for each unit sold. Then determine how changes in unit sold and cost per unit affect Break-Even Unit, price between 7 and 17 in 1 increments and Cost per unit between 3.5 and 6.5 in 0.5 increments

I need it to be solved using modeling , sensitivity analysis and financial excel functions with excel or written.