Can you help me explain this questions?

1. Terrific Toys Company manufactures and sells children's skateboards. Each skateboard requires four bearings. For September, Terrific Toys Company has budgeted skateboard sales of 530 skateboards, while 570 skateboards are scheduled to be produced. Terrific Toys Company will begin September with 220 bearings in its beginning inventory. How many bearings should Terrific Toys Company purchase in September?
2. Beloved Baby Company manufactures and sells children's strollers. Each stroller requires eight screws. For September, Beloved Baby Company will begin September with 380 screws in its beginning inventory. Beloved Baby Company has budgeted stroller sales of 530 strollers, while 570 strollers are scheduled to be produced. How many screws should Beloved Baby Company purchase in September?
3. Mighty Corporation manufactures end-tables. Each end table requires 0.50 direct labor hours in its production. Mighty Corporation has a direct labor rate of $15 per direct labor hour. The production budget shows that Mighty Corporation plans to produce 1,000 end tables in March and 1,100 end tables in April. What is the total combined direct labor cost that Mighty Corporation should budget in March and April?
4. Forty Winks Corporation manufactures nightstands. The production budget shows that Forty Winks Corporation plans to produce 1,200 nightstands in March and 1,050 nightstands in April. Each nightstand requires 0.50 direct labor hours in its production. Forty Winks Corporation has a direct labor rate of $12 per direct labor hour. What is the total combined direct labor cost that Forty Winks Corporation should budget in March and April?