Dakota Office Product (Case): Based on the Dakota Office Product case, following information is give:

Services Provided to Customer A and Customer B

Particulars	Customer A	Customer B
No. of cartons ordered	200	200
No. of cartons shipped (commercial freight)	200	150
No. of desktop deliveries		25
No. of manual orders	6	100
No. of line items (manual)	60	180
No. of EDI orders	6
Average Account Receivables	9,000	30,000

Profitability Analysis of Customer A and B

Particulars	Customer A	Customer B
Sales	103,000	104,000
Cost of items purchased	85,000	85,000
Gross Margin	18,000	19,000
Cost of processing cartons	10,400	10,400
Cost of shipping cartons (commercial freight)	1,200	900
Cost of shipping cartons (desktop delivery)		5,500
Cost of processing orders (manual)	60	1,000
Cost of entering line items (manual orders)	240	720
Cost of processing EDI orders	30
Interest cost on average account receivables	900	3,000
Profit from customers	5,170	-2,520

1.How much interest rate (per annum) should DOP charge from Customer B on the account receivables of $30,000 in order to achieve a profit of $0;

2.What will be the profit for DOP from Customer B if all its cartons are shipped via commercial freight;

3.The per unit cost of processing EDI orders divided by the per unit cost of processing orders manually is;

4.What will be the profit from Customer A if DOP is not incurring any interest cost on its accounts receivables;

5. In relation to the costs incurred by DOP, which activity accounts for the biggest absolute difference between Customer A and Customer B?