diff --git a/src/main/java/millions/calculators/PurchaseCalculatorFactory.java b/src/main/java/millions/calculators/PurchaseCalculatorFactory.java
new file mode 100644
index 0000000..7f496cf
--- /dev/null
+++ b/src/main/java/millions/calculators/PurchaseCalculatorFactory.java
@@ -0,0 +1,18 @@
+package millions.calculators;
+
+import millions.Share;
+
+public class PurchaseCalculatorFactory extends TransactionCalculatorFactory {
+  Share share;
+
+  @Override
+  public void setShare(Share share) {
+    this.share = share;
+  }
+
+  @Override
+  public TransactionCalculator createCalculator() {
+    return new PurchaseCalculator(share);
+  }
+
+}
diff --git a/src/main/java/millions/calculators/SaleCalculatorFactory.java b/src/main/java/millions/calculators/SaleCalculatorFactory.java
new file mode 100644
index 0000000..fd16818
--- /dev/null
+++ b/src/main/java/millions/calculators/SaleCalculatorFactory.java
@@ -0,0 +1,16 @@
+package millions.calculators;
+
+import millions.Share;
+
+public class SaleCalculatorFactory extends TransactionCalculatorFactory {
+  Share share;
+
+  @Override
+  public void setShare(Share share) {
+    this.share = share;
+  }
+  @Override
+  public TransactionCalculator createCalculator() {
+    return new SaleCalculator(share);
+  }
+}
diff --git a/src/main/java/millions/calculators/TransactionCalculatorFactory.java b/src/main/java/millions/calculators/TransactionCalculatorFactory.java
new file mode 100644
index 0000000..106ca73
--- /dev/null
+++ b/src/main/java/millions/calculators/TransactionCalculatorFactory.java
@@ -0,0 +1,8 @@
+package millions.calculators;
+
+import millions.Share;
+
+public abstract class TransactionCalculatorFactory {
+  public abstract void setShare(Share share);
+  public abstract TransactionCalculator createCalculator();
+}