Akash Created a Custom Form for His Supervisor That Includes

Multiple Choice

Akash created a custom form for his supervisor that includes a subform based on a query for unpaid invoices.  After creating the form and viewing it in Form view,Akash needs to make some changes.  Decide which options are best for Akash to use to make the necessary changes to the custom form design.
-Akash has included a calculated field in the subform which was created using a query for unpaid invoices.The calculated field should show the total amount of unpaid invoices from the InvoiceAmt field;however,the form does not show the calculation in Form view.Which expression will solve this problem?

A) Sum([InvoiceAmt])
B) =Sum([InvoiceAmt])
C) Count([InvoiceAmt])
D) =Count([InvoiceAmt])