Help me to solve this java problem

## TimberCo
Obuds2020 is a wood based business which specializes in sourcing and selling different kinds of wood.
Currently their focus is on softwood and hardwood.
The woods are categorized according to the dimensions as :
A-1X1",<br>
B-1X2",<br>
C-2X2",<br>
D-2X3",<br>
E-3X3",<br>
F-3X4",<br>
G-4X4",<br>
H-1X6",<br>
I-2X6",<br>
J-3X6"<br>
## The selling price per foot of the
dimension categories, A,B,C,D,E,F,G,H is based on the cost of A according to the rules:
Cost of B=A +30%A,<br>
Cost of C=B +30%B,<br>
Cost of D=C +30%C,<br>
Cost of E=D +30%D,<br>
Cost of F=E+30%E,<br>
Cost of G=F +20%F, <br>
Cost of H=G +20%G. <br>
 The cost of A may be reset from time to time if it becomes necessary.
The selling price per foot for J and that of I are related by Cost of J=I +50%I. The cost for I may be
reset from time to time if it becomes necessary.
At all times the selling price per foot is 100% of the purchase price per foot from the supplier.
Hardwood is always 200% more costly that softwood at the supplier point and 220% more costly at the
selling point.
# Requirements
## You are required to well commented abstract a class with with relevant data and methods to make it
possible to:
1. Generate a report on sales for each category of wood.
2. Generate a report on stock at any one period of time.
3. Generate a report on profit earned by a sale for each category of wood.
4. Generate a report on total profit made.
5. Draw a UML diagram of the abstract class
## Write well commented program ( main calss) that make use of the above class and also use the
following programming construct:
• Paramerised constructor
• A method that receives an object and then process the profit made
• Use of Math.random() method to generate lengths of feet sold
• A method that receives an array of objects and then process the sales made
• A method that creates an array of objects sold and return the array
## Deliverable
1. A pdf document that contains the entire program and the UML diagram and the output results

public static void main(String[] args){   
    
    int[] my_array1 = {
            1789, 2035, 1899, 1456, 2013, 
            1458, 2458, 1254, 1472, 2365, 
            1456, 2165, 1457, 2456
         };
            
    String[] WoodType = {
           "A-1X1",
	   "B-1X2",
	   "C-2X2",
	   "D-2X3",
	   "E-3X3",
	   "F-3X4",
	   "G-4X4",
	   "H-1X6",
	   "I-2X6",
	   "J-3X6"
        };        
    System.out.println("Original numeric array : "+Arrays.toString(my_array1));
    
    System.out.println("Original string array : "+Arrays.toString(WoodType));
    double costA = 300.0;
        
    if (WoodType[1] == "A") {
        costA = 300;
      }
      else if(WoodType[1] == "B") {
        int costB = costA + 0.3(costA);
      }
      else if(WoodType[1] == "C") {
        int costC = costB + 0.3(costB);
      }
      else if(WoodType[1] == "D") {
        int costC = costC + 0.3(costC);
      }
      else if(WoodType[1] == "E") {
        int costE = costD + 0.3(costD);
      }
      else if(WoodType[1] == "F") {
        int costF = costE + 0.3(costE);
      }
      else if(WoodType[1] == "G") {
        int costG = costF + 0.3(costF);
      }
      else if(WoodType[1] == "H") {
        int costH = costG + 0.3(costG);
      }
      else if(WoodType[1] == "I") {
        int costI = costH + 0.3(costH);
      }
      else if(WoodType[1] == "J") {
        int costJ = costI + 0.3(costI);
      }
      // checks if number is less than 0
      
      
      // if both condition is false
      else {
        System.out.println("The number is 0.");
      }
      final int NUM_DAYS = 30; // Number of days of sales
      String filename;         // The name of the file to open
      double totalSales;       // Total sales for period
      double averageSales;     // Average daily sales
      
      // Get the name of the file.
      filename = getFileName();
      
      // Get the total sales from the file.
      totalSales = getTotalSales(filename);
      
      // Calculate the average.
      averageSales = totalSales / NUM_DAYS;
      
      // Display the total and average.
      displayResults(totalSales, averageSales);

      public static double getTotalSales(String filename)
      throws IOException
{
double total = 0.0;  // Accumulator
double sales;        // A daily sales amount

// Open the file.
File file = new File(filename);
Scanner inputFile = new Scanner(file);

// This loop processes the lines read from the file,
// until the end of the file is encountered.
while (inputFile.hasNext())
{
// Read a double from the file.
sales = inputFile.nextDouble();

// Add sales to the value already in total.
total += sales;
}

// Close the file.
inputFile.close();

// Return the total sales.
return total;
}