The following information is provided for Techno-World, a company specializing in providing Internet technology assistance for clients:

Techno-World

	2013	2014	2015	2016
Cash	$2,000	$2,400	$2,800	$3,000
Accounts receivable	400	500	600	900
Inventory	600	700	800	1,000
PP&E (net)	1,500	1,700	1,800	1,950
Notes receivable	500	500	500	500
Total Assets	$5,000	$5,800	$6,500	$7,350
Accounts Payable	700	975	1,025	1,275
Other Current Liabilities	250	450	550	625
Notes Payable	1,200	1,400	1,550	1,800
Total Liabilities	$2,150	$2,825	$3,125	$3,700
Stock Outstanding	$1,100	$1,100	$1,100	$1,100
Retained Earnings	1,750	1,875	2,275	2,550
Total Shareholders' Equity	$2,850	$2,975	$3,375	$3,650
Total Liabilities and Shareholders' Equity	$5,000	$5,800	$6,500	$7,350

Perform a horizontal analysis of this balance sheet and identify any accounts that may be questionable. Take into account technology industry trends when performing the analysis.