diff --git a/src/InsuranceCalculator.java b/src/InsuranceCalculator.java
index 558e0a0..0a91ecc 100644
--- a/src/InsuranceCalculator.java
+++ b/src/InsuranceCalculator.java
@@ -1,14 +1,20 @@
 public class InsuranceCalculator {
 
+    private InsuranceStrategy strategy;
+
     public double calculateInsurance(double income) {
         if (income <= 10000) {
-            return income*0.365;
+            strategy = new InsuranceStrategyVeryLowIncome();
+            return strategy.calculate(income);
         } else if (income <= 30000) {
-            return (income-10000)*0.2+35600;
+            strategy = new InsuranceStrategyLowIncome();
+            return strategy.calculate(income);
         } else if (income <= 60000) {
-            return (income-30000)*0.1+76500;
+            strategy = new InsuranceStrategyMedIncome();
+            return strategy.calculate(income);
         } else {
-            return (income-60000)*0.02+105600;
+            strategy = new InsuranceStrategyHighIncome();
+            return strategy.calculate(income);
         }
     }
 
diff --git a/src/InsuranceStrategy.java b/src/InsuranceStrategy.java
new file mode 100644
index 0000000..5b22a73
--- /dev/null
+++ b/src/InsuranceStrategy.java
@@ -0,0 +1,11 @@
+public abstract class InsuranceStrategy {
+    double calculate(double income) {
+        return (income - getAdjustment()) * getWeight() + getConstant();
+    }
+
+    public abstract int getConstant();
+
+    public abstract double getWeight();
+
+    public abstract int getAdjustment();
+}
diff --git a/src/InsuranceStrategyHighIncome.java b/src/InsuranceStrategyHighIncome.java
new file mode 100644
index 0000000..3e3a2ed
--- /dev/null
+++ b/src/InsuranceStrategyHighIncome.java
@@ -0,0 +1,20 @@
+public class InsuranceStrategyHighIncome extends InsuranceStrategy {
+    public InsuranceStrategyHighIncome() {
+
+    }
+
+    @Override
+    public int getConstant() {
+        return 105600;
+    }
+
+    @Override
+    public double getWeight() {
+        return 0.02;
+    }
+
+    @Override
+    public int getAdjustment() {
+        return 60000;
+    }
+}
\ No newline at end of file
diff --git a/src/InsuranceStrategyLowIncome.java b/src/InsuranceStrategyLowIncome.java
new file mode 100644
index 0000000..161acf1
--- /dev/null
+++ b/src/InsuranceStrategyLowIncome.java
@@ -0,0 +1,16 @@
+public class InsuranceStrategyLowIncome extends InsuranceStrategy {
+    @Override
+    public int getConstant() {
+        return 35600;
+    }
+
+    @Override
+    public double getWeight() {
+        return 0.2;
+    }
+
+    @Override
+    public int getAdjustment() {
+        return 10000;
+    }
+}
diff --git a/src/InsuranceStrategyMedIncome.java b/src/InsuranceStrategyMedIncome.java
new file mode 100644
index 0000000..5e0ddcd
--- /dev/null
+++ b/src/InsuranceStrategyMedIncome.java
@@ -0,0 +1,16 @@
+public class InsuranceStrategyMedIncome extends InsuranceStrategy {
+    @Override
+    public int getConstant() {
+        return 76500;
+    }
+
+    @Override
+    public double getWeight() {
+        return 0.1;
+    }
+
+    @Override
+    public int getAdjustment() {
+        return 30000;
+    }
+}
diff --git a/src/InsuranceStrategyVeryLowIncome.java b/src/InsuranceStrategyVeryLowIncome.java
new file mode 100644
index 0000000..ba00986
--- /dev/null
+++ b/src/InsuranceStrategyVeryLowIncome.java
@@ -0,0 +1,16 @@
+public class InsuranceStrategyVeryLowIncome extends InsuranceStrategy {
+    @Override
+    public int getConstant() {
+        return 0;
+    }
+
+    @Override
+    public double getWeight() {
+        return 0.365;
+    }
+
+    @Override
+    public int getAdjustment() {
+        return 0;
+    }
+}
diff --git a/test/EMPTY b/test/EMPTY
deleted file mode 100644
index e69de29..0000000
diff --git a/test/InsuranceCalculatorTest.java b/test/InsuranceCalculatorTest.java
new file mode 100644
index 0000000..4d99cd4
--- /dev/null
+++ b/test/InsuranceCalculatorTest.java
@@ -0,0 +1,27 @@
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class InsuranceCalculatorTest {
+
+    @Test
+    public void CalculateVeryLowIncome() {
+        assertEquals(730, calculateInsurance(2000));
+    }
+    @Test
+    public void CalculateLowIncome() {
+        assertEquals(39600, calculateInsurance(30000));
+    }
+    @Test
+    public void CalculateMedIncome() {
+        assertEquals(79500, calculateInsurance(60000));
+    }
+
+    @Test
+    public void CalculateHighIncome() {
+        assertEquals(106200, calculateInsurance(90000));
+    }
+    private double calculateInsurance(double income) {
+        return new InsuranceCalculator().calculateInsurance(income);
+    }
+}
\ No newline at end of file