Please help me solve the following question of basic simple interest... I am having issue solving question 3... I can't figure out where I am making my mistake... Please is the picture below of the question (picture #1) and answer key (picture #2).

3. On August 1, the Marydale Department Store purchased directlyr from the manufacturer 1m chenille min-sire blankets at $125 each, less trade discounts of 15% and 20%. The credit terms on the invoice were 3110 ROG. Marydale Department Store received the merchandise on September 2 and paid the manufacturer on September 12. An additional $35 freight charge was paid directly to Speedyr Delivery Service on September 30. Marydale has a markup of 25% on cost for overhead and 15% on cost for net pmt. During September through February, the store said T5 blankets at the regular list price. In March, the remaining blankets were marked down 50% and sold. Determine the following: a. The amount remitted on September 12 b. The total cost and the individual cost per blanket after the cash discount c. The regular list price of each blanket d. The reduced price of each blanket in March e. The total revenue received from the sale of the 100 blankets f. The amount of operating prot or operating loss 3. The percent of cost that this prot or loss was (to the nearest tenth] 1Q? SECTION 3 1. a. $1,120 b. $548.80 c. $554.40 d. $1, 103.20; $13.79 e. $19.31 f. $11.59 g. $1,313.20 h. Operating loss, $10.64 i. 1.0% 3. a. $8,245 b. $8,280; $82.80 c. $115.92 d. $57.96 e. $10,143 f. Operating loss, $207 g. 2.5%