diff --git a/.idea/misc.xml b/.idea/misc.xml
index 0792e77..7d862fb 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_13" default="true" project-jdk-name="13.0.1" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="corretto-11" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/InsuranceCalculator.java b/src/InsuranceCalculator.java
index 558e0a0..1d3b3bf 100644
--- a/src/InsuranceCalculator.java
+++ b/src/InsuranceCalculator.java
@@ -1,15 +1,20 @@
 public class InsuranceCalculator {
 
+    private InsuranceStrategy strategy;
+
     public double calculateInsurance(double income) {
         if (income <= 10000) {
-            return income*0.365;
+            strategy = new InsuranceStrategyLow();
+            return strategy.calculate(income);
         } else if (income <= 30000) {
-            return (income-10000)*0.2+35600;
+            strategy = new InsuranceStrategyMedium();
+            return strategy.calculate(income);
         } else if (income <= 60000) {
-            return (income-30000)*0.1+76500;
+            strategy = new InsuranceStrategyHigh();
+            return strategy.calculate(income);
         } else {
-            return (income-60000)*0.02+105600;
+            strategy = new InsuranceStrategyVeryHigh();
+            return strategy.calculate(income);
         }
     }
-
 }
diff --git a/src/InsuranceStrategy.java b/src/InsuranceStrategy.java
new file mode 100644
index 0000000..53de621
--- /dev/null
+++ b/src/InsuranceStrategy.java
@@ -0,0 +1,11 @@
+public abstract class InsuranceStrategy {
+    public double calculate(double income) {
+        return (income - getAdjustment()) * getWeight() + getConstant();
+    }
+
+    protected abstract int getConstant();
+
+    protected abstract double getWeight();
+
+    protected abstract int getAdjustment();
+}
diff --git a/src/InsuranceStrategyHigh.java b/src/InsuranceStrategyHigh.java
new file mode 100644
index 0000000..a04b5e9
--- /dev/null
+++ b/src/InsuranceStrategyHigh.java
@@ -0,0 +1,16 @@
+public class InsuranceStrategyHigh extends InsuranceStrategy {
+    @Override
+    protected int getConstant() {
+        return 76_500;
+    }
+
+    @Override
+    protected double getWeight() {
+        return 0.1;
+    }
+
+    @Override
+    protected int getAdjustment() {
+        return 30_000;
+    }
+}
diff --git a/src/InsuranceStrategyLow.java b/src/InsuranceStrategyLow.java
new file mode 100644
index 0000000..838fe75
--- /dev/null
+++ b/src/InsuranceStrategyLow.java
@@ -0,0 +1,16 @@
+public class InsuranceStrategyLow extends InsuranceStrategy {
+    @Override
+    protected int getConstant() {
+        return 0;
+    }
+
+    @Override
+    protected double getWeight() {
+        return 0.365;
+    }
+
+    @Override
+    protected int getAdjustment() {
+        return 0;
+    }
+}
diff --git a/src/InsuranceStrategyMedium.java b/src/InsuranceStrategyMedium.java
new file mode 100644
index 0000000..2d2c941
--- /dev/null
+++ b/src/InsuranceStrategyMedium.java
@@ -0,0 +1,16 @@
+public class InsuranceStrategyMedium extends InsuranceStrategy {
+    @Override
+    protected int getConstant() {
+        return 35_600;
+    }
+
+    @Override
+    protected double getWeight() {
+        return 0.2;
+    }
+
+    @Override
+    protected int getAdjustment() {
+        return 10_000;
+    }
+}
diff --git a/src/InsuranceStrategyVeryHigh.java b/src/InsuranceStrategyVeryHigh.java
new file mode 100644
index 0000000..4db2082
--- /dev/null
+++ b/src/InsuranceStrategyVeryHigh.java
@@ -0,0 +1,19 @@
+public class InsuranceStrategyVeryHigh extends InsuranceStrategy {
+    public InsuranceStrategyVeryHigh() {
+    }
+
+    @Override
+    protected int getConstant() {
+        return 105600;
+    }
+
+    @Override
+    protected double getWeight() {
+        return 0.02;
+    }
+
+    @Override
+    protected int getAdjustment() {
+        return 60000;
+    }
+}
\ No newline at end of file
diff --git a/test/IfElseDemoTest.java b/test/IfElseDemoTest.java
new file mode 100644
index 0000000..7edb0c5
--- /dev/null
+++ b/test/IfElseDemoTest.java
@@ -0,0 +1,29 @@
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class InsuranceCalculatorTest {
+    @Test
+    public void lowIncomeInsuranceIsCorrect() {
+        assertEquals(1825, insuranceFor(5000), 0.01);
+    }
+
+    @Test
+    public void mediumIncomeInsuranceIsCorrect() {
+        assertEquals(38600, insuranceFor(25000), 0.01);
+    }
+
+    @Test
+    public void highIncomeInsuranceIsCorrect() {
+        assertEquals(78500, insuranceFor(50000), 0.01);
+    }
+
+    @Test
+    public void veryHighIncomeInsuranceIsCorrect() {
+        assertEquals(106400, insuranceFor(100_000), 0.01);
+    }
+
+    private double insuranceFor(double income) {
+        return new InsuranceCalculator().calculateInsurance(income);
+    }
+}