CAN YOU HELP ME WITH THE LAST QUESTION 1.5?

Carefully observe the following information, and provide your attempts--computation processes and answers--to each problem separately. Cost structure and product price of Chico garden tool company Investment (spent) $70,000 Other fixed overhead $20,000 R&D (spent) $60,000 Labor $3 per garden tool (unit) Traditional media advertising $50,000 Materials $2 per garden tool (unit) Social media marketing $40,000 Discount coupon $1 per garden tool (unit) Factory facility rental $30,000 Selling price $13 per garden tool (unit) 1.1) What is "Unit contribution (per unit)" of Chico garden tool company's garden tool? 1.2) Break-even volume of its garden tool? 1.3) Dollar break-even of its garden tool? 1.4) How many garden tools to sell to achieve a profit target of $70,000? 1.5) When discount coupon cost is increased to $2 per garden tool (unit). new break-even volume of garden tool with this $2 coupon (when other items stay unchanged)