Delta Company has provided the following information for its only product, DTA, for the year $2023.$

Sales $(1,000$ units of DTA$)$ $$1,000,000$

Cost of goods sold $($only variable costs$)523680$

Store manager's salary $106691$

Operating costs $212468$

Advertising and promotion $22859$

Sales commissions $30999$

Compute the variable cost per unit of DTA sold.