<div class="form-row">
          <div class="form-group col-md-5">
            <label>Purchase price</label>
            <input type="text" class="form-control" formControlName="purchaseprice">
          </div>
          <div class="form-group col-md-2">
            <label>Taxes</label>
            <select class="form-control" formControlName="taxes">
              <option>21%</option>
              <option>10%</option>
              <option>4%</option>
            </select>
          </div>
          <div class="form-group col-md-5">
            <label>Purchase price + Taxes.</label>
            <input type="text" class="form-control" formControlName="pricetaxes">
          </div>
        </div>