We have a question: The dog toys Samantha buys for her dog are "buy one get one half off" and all cost $12.00 each. She buys 4 toys. How much does she spend on dog toys?
And an answer: 36
So how you got the answer?
If she buys 1 toy at $12.00 she gets the 2nd toy 1 / 2 off, the 2nd toy is 12 * .5 = $6.00. 1 full - priced toy is $12.00 and 1 / 2 priced toy is $6.00 so these 2 toys come to 12 + 6 = $18.00. She buys 2 more toys that are "buy one get one 1 / 2 off" so all total she spends 2 * 18 = $36.00.

We have a question: Vicente bought 5 kilograms of rice and 3 pounds of meat. Each kilogram of rice is $2 and a pound of meat is $5. How much did Vicente spend in total?
And an answer: 25
So how you got the answer?
Vicente spent 5 x $2 = $10 for 5 kilograms of rice. He spent 3 x $5 = $15 for 3 pounds of meat. Therefore, the total amount he spent was $15 + $10 = $25.

We have a question: A flagpole is 12 feet tall. It breaks, folding over in half, such that what was the tip of the flagpole is now dangling two feet above the ground. How far from the base, in feet, did the flagpole break?
And an answer: 7
So how you got the answer?
The break occurred (12 - 2) / 2 = 5 feet from the top. Then it was 12 - 5 = 7 feet from the base.