[ 'code' => 'Product Code', 'name' => 'Product Name', 'coa' => 'Chart of Account (COA)', ], 'invoice' => [ 'code' => 'Invoice Code', 'name' => 'Invoice Name', 'net_amount' => 'Net Amount', 'status' => 'Status', 'type' => 'Type', 'gross_amount' => 'Gross Amount', 'discount_amount' => 'Discount Amount', 'client_name' => 'Client Name', 'detail' => [ 'no_register' => 'Registration Number', 'student_name' => 'Student Name', 'admission_track' => 'Admission Track', 'academic_program' => 'Academic Program', 'faculty' => 'Faculty', 'study_program' => 'Study Program', 'class_year' => 'Class Year', 'term_entry' => 'Term Entry', 'semester' => 'Semester', 'fee_type' => 'Fee Type', ], ], 'invoice_item' => [ 'code' => 'Item Code', 'name' => 'Item Name', 'quantity' => 'Quantity', 'gross_price' => 'Gross Price', 'discounted_price' => 'Discounted Price', 'net_price' => 'Net Price', ], ];