Please help me with inserting the cell references!! I keep getting the solution right but the cell reference equations wrong$$

Using Excel to Cost Inventory

PROBLEM

In its first month of operations, McLanie Company made three purchases. Information concerning these purchases and units on hand are:

Units on hand at period end

Purchases of merchandise were made in the sequence listed above.

Student Work Area

Required: Provide input into cells shaded in yellow in this template.Use only mathematical formulas with cell references to compute the unit cost and the cost of ending inventory.

Compute the cost of the ending inventory under the average$-$cost method in a periodic inventory system.

Weighted$-$average unit cost

$\backslash (=(\backslash$mathrm$\{$C$\}10*\backslash$mathrm$\{$E$\}10+\backslash$mathrm$\{$C$\}11*\backslash$mathrm$\{$E$\}11)+\backslash$mathrm$\{$C$\}12*\backslash$mathrm$\{$E$\}12)/\backslash$mathrm$\{$C$\}10+\backslash$mathrm$\{$C$\}11+\backslash$mathrm$\{$C$\}12\backslash )$

Round unit cost to $3$ decimals using the ROUND function

Cost of ending inventory