Tech Innovators Inc. has provided the following expense details for the current year:

Consulting and legal fees: $1,600,000

Office lease payments: $3,000,000

Interest on bonds: $2,500,000

Loss on disposal of old equipment: $450,000

Freight in: $1,300,000

Freight out: $2,000,000

Senior management salaries: $2,100,000

General insurance: $950,000

Sales staff salaries: $2,400,000

Research and development: $1,300,000

Marketing campaigns: $1,800,000

The office space is utilized equally by sales and administrative departments.

Requirements:

Calculate the total general and administrative expenses.

Determine the total expenses related to sales and marketing.

Compute the total R&D expenses.

Identify the expenses that fall under non-operating expenses.