Adding pricing calculator

pricingCalculator/conversion/conversion.go

@@ -0,0 +1,20 @@
+package conversion
+
+import "errors"
+import "strconv"
+
+func StringsToFloats(strings []string) ([]float64, error) {
+	var floats []float64
+
+	for _, stringVal := range strings {
+		floatVal, err := strconv.ParseFloat(stringVal, 64)
+
+		if err != nil {
+			return nil, errors.New("Failed to convert string to float")
+		}
+
+		floats = append(floats, floatVal)
+	}
+
+	return floats, nil
+}