Give the step-by-step reasoning process and then the final answer. Marta sells tomatoes in a grocery store. On Friday, a shipment of 1000 kg of tomatoes arrived at the store. On Saturday, Marta sold a total of 300 kg of tomatoes to customers. On Sunday, the store was closed, causing 200 kg of tomatoes to rot and to be thrown away. On Monday morning another shipment arrived, twice the size of the first one. How many kilograms of tomatoes did Marta have ready for sale on Tuesday?
Marta had 1000 kg of tomatoes on Friday and sold 300 kg on Saturday, so she has 1000 – 300 = 700 kg of tomatoes left. On Sunday 200 kg of tomatoes had to be thrown away, so 700 – 200 = 500 kg of tomatoes were left. The shipment on Monday was twice the size of the first one, so it was 2 * 1000 = 2000 kg of tomatoes. The total amount of tomatoes ready for sale on Tuesday was 500 + 2000 = 2500 kg.
The final answer: 2500.