Step-by-step reasoning process: The number of shoes the factory made was 12000 dolls x 2 shoes / doll = 24000 shoes. The factory also made for each doll 12000 dolls x 3 bags / doll = 36000 bags. The set of cosmetics made for each doll was just one, so there are 12000 cosmetics sets. Finally, the number of hats for the dolls was 12000 dolls x 5 hats / doll = 60000 hats. In total, the number of accessories was 24000 + 36000 + 12000 + 60000 = 132000 accessories. The dolls took in total 12000 dolls x 45 seconds / doll = 540000 seconds to be made. All the accessories also took 132000 accessories x 10 seconds / accessory = 1320000 seconds. Combing both results, we have that the total time the machinery was working was 1320000 + 540000 = 1860000 seconds.
[Q & A] The question is Last month, a factory made 12000 dolls and their associated accessories. The accessories for each doll included 2 shoes, 3 bags, 1 set of cosmetics, and 5 hats. If each doll took 45 seconds to make and each accessory took 10 seconds to make, what was the total combined machine operation time, in seconds, required to manufacture all of the dolls and their accessories?
The answer is 1860000

Step-by-step reasoning process: The number of paintings Philip will make after 30 days is 2 paints / day * 30 days = 60 paintings. Then, the total number of his paintings will be 60 paintings + 20 paintings = 80 paintings.
[Q & A] The question is Philip is a painter. He makes 2 paintings per day. If he already has 20 paintings, how many paintings in total will he have after 30 days?
The answer is 80

Step-by-step reasoning process: The sum of the weights of the five girls is 45 kg x 5 = 225 kg. The sum of the weights of the five boys is 55 kg x 5 = 275 kg. The sum of the weights of the ten students is 225 kg + 275 kg = 500 kg. Hence, the average weight of those ten students is 500 kg / 10 = 50 kg.
[Q & A] The question is One of the activities in Grade 6 PE class is to get the average weight of the students from each group. In one of the groups, the average weight of five girls is 45 kg while the average weight of five boys is 55 kg. What is the average weight of the ten students from that group?
The answer is 50

Step-by-step reasoning process: She orders 2 sandwiches that are $7.75 so they cost 2 * $7.75 = $15.50. The brie is three times more expensive than the $4.00 salami so the brie costs 3 * $4 = $12.00. She buys 1 / 4 pound of the olives that costs $10.00 a pound so they cost .25 * $10 = $2.50. She buys 1 / 2 pound of feta that costs $8.00 a pound so it costs .5 * $8 = $4.00. The salami is $4.00, the brie is $12.00, olives are $2.50 and the feta is $4.00 and the sandwiches are $15.50 for a total of $4 + $12 + $2.50 + $4 + $15.50 = $38.00. Adding the french bread gives $38.00 + $2.00 = $40.
[Q & A]
The question is Teresa orders 2 fancy ham and cheese sandwiches for $7.75 each at a local shop. While there, she decides to pick up some salami for $4.00, more brie which is three times the price of the salami, a 1/4 pound of olives that are $10.00 per pound, 1/2 pound of feta cheese that's $8.00 a pound and another loaf of french bread that is $2.00. How much does she spend at the local shop?
The answer is 40