How to get the total order per company ?

Hi guys, I'm stuck on this exercise and I need some help please.

Give the CompanyName of those customers with orders over $100000. Include the subtotal plus tax plus freight.

Please find the schema below: 

CustomerAW(CustomerID, FirstName, MiddleName, LastName, CompanyName, EmailAddress)

CustomerAddress(CustomerID, AddressID, AddressType)

Address(AddressID, AddressLine1, AddressLine2, City, StateProvince, CountyRegion, PostalCode)

SalesOrderHeader(SalesOrderID, RevisionNumber, OrderDate, CustomerID, BillToAddressID, ShipToAddressID, ShipMethod, SubTotal, TaxAmt, Freight)

SalesOrderDetail(SalesOrderID, SalesOrderDetailID, OrderQty, ProductID, UnitPrice, UnitPriceDiscount)

ProductAW(ProductID, Name, Color, ListPrice, Size, Weight, ProductModelID, ProductCategoryID)

ProductModel(ProductModelID, Name)

ProductCategory(ProductCategoryID, ParentProductCategoryID Name)

ProductModelProductDescription(ProductModelID, ProductDescriptionID, Culture)

ProductDescription(ProductDescriptionID, Description)