Answer:
to record Decker's investment:
Dr Cash 45000
Cr Decker, Capital 45000
to record Rosen's investment:
Dr Land 10,000
Dr Building 75,000
Cr Rosen, Capital 85,000
to record Toso's investment:
Dr Cash 10,000
Dr Accounts Receivable 27,000
Dr Equipment 14,000
Cr Allowance for Doubtful Accounts 2,700
Cr Toso, Capital 48,300
total owners' equity = $178,300