How can I figure out this multiple step problem with explanation for required $1-15$

Clopack Company manufactures one product that goes through one processing department called Mixing. All raw materials are introduced at the start of work in the Mixing Department. The company uses the weighted$-$average method of process costing. Its Work in Process T$-$account for the Mixing Department for June follows $($all forthcoming questions pertain to June$)$:

$\backslash$table$[[$Work in Process$-$Mixing Department$],[$June $1$ balance,$28,000,$Completed and transferred to Finished Goods,?with explanation for required $1-15$