Shown below are the T-accounts relating to equipment that was purchased for cash by a company on the first day of the current year. The equipment was depreciated on a straight-line basis with an estimated useful tife of 10 vears and a salvage value of $280. Part of the equipment was sold on the last day of the current year for cash proceeds. \begin{tabular}{|c|c|c|c|} \hline \multicolumn{4}{|c|}{ Accumulated Depreciation-Equipment } \\ \hline & & Dec, 31 & 100 \\ \hline Dec. 31 & 220 & & \\ \hline \end{tabular} Depreciation Expense Dec. 31 (b) Gain on Disposal of Plant Assets Dec 31 (c) Prepare the journal entry to record sale of part of the equipment on December 31. (Credit account tities are outomatically indented when the amount is entered. Do not indent manually. If no entry is required, sefect "No Entry" for the occount titles and enter of for the amounts! What was the gain on disposal