Costs of Services (exclusive of depreciation and amortization). Costs of services (exclusive of depreciation and amortization) increased by $31.6 million, or 21.1%, to $181.2 million for the fiscal year-to-date period ended June 27, 2020 from $149.6 million for the fiscal year-to-date period ended June 29, 2019. The increase in costs of services was due primarily to an increase of $11.7 million in employee compensation and fringe benefit costs associated with our increased consulting headcount, an increase in incentive and retention compensation costs of $9.9 million, an increase in forgivable loan amortization of $1.9 million, an increase in expense related to other compensation of $2.0 million, and an increase in the valuation expense of the contingent consideration of $0.6 million, partially offset by a decrease in stock compensation expense of $0.5 million. Additionally, client reimbursable expenses increased by $5.9 million in the first half of fiscal 2020 compared to the first half of fiscal 2019. As a percentage of revenues, costs of services (exclusive of depreciation and amortization) increased to 72.7% for the first half of fiscal 2020 from 69.1% for the first half of fiscal 2019.
Selling, General and Administrative Expenses. Selling, general and administrative expenses decreased by $1.0 million, or 2.2%, to $45.5 million for the first half of fiscal 2020 from $46.5 million for the first half of fiscal 2019. The primary contributors to this decrease were a $2.7 million decrease in travel and entertainment, a $1.0 million decrease in legal and other professional services fees, a $0.5 million decrease in training and marketing, a $0.1 million decrease in bad debt expense, and a $0.7 million decrease in commissions to non-employee experts. These decreases were partially offset by increases of $3.0 million in rent expense primarily due to additional space in our Oakland and New York offices, employee and incentive compensation of $0.5 million, and software subscriptions and data services of $0.5 million.
As a percentage of revenues, selling, general and administrative expenses decreased to 18.3% for the fiscal year-to-date period ended June 27, 2020 from 21.5% for the fiscal year-to-date period ended June 29, 2019. Commissions to our non-employee experts decreased to 2.3% of revenues for the fiscal year-to-date period ended June 27, 2020 compared to 3.0% of revenues for the fiscal year-to-date period ended June 29, 2019 as less revenue was sourced by non-employee experts in the first half of fiscal 2020 compared to the first half of fiscal 2019.
Provision for Income Taxes. For the fiscal year-to-date period ended June 27, 2020, our income tax provision was $4.6 million, and the effective tax rate was 27.2%, compared to a provision of $3.8 million and an effective tax rate of 27.1% for the fiscal year-to-date period ended June 29, 2019. The effective tax rates for both fiscal year-to-date periods were the same as the combined federal and state statutory tax rate but included the effect of offsetting adjustments primarily driven by the tax benefit on stock-based compensation and non-deductible items resulting from limitations on the deductibility of compensation paid to executive officers and the deductibility of meals and entertainment.
Net Income. Net income increased by $2.2 million to $12.4 million for the fiscal year-to-date period ended June 27, 2020 from $10.2 million for the fiscal year-to-date period ended June 29, 2019. The diluted net income per share was $1.55 for the fiscal year-to-date period ended June 27, 2020, compared to diluted net income per share of $1.23 for the fiscal year-to-date period ended June 29, 2019. Diluted weighted average shares outstanding decreased by approximately 303,000 to approximately 7,979,000 shares for the fiscal year-to-date period ended June 27, 2020 from approximately 8,282,000 shares for the fiscal year-to-date period ended June 29, 2019. The decrease in weighted average diluted shares outstanding was primarily due to the repurchase of shares of our common stock since June 29, 2019, offset in part by the vesting of restricted stock and time-vesting restricted stock units and the exercise of stock options since June 29, 2019.
Liquidity and Capital Resources
Fiscal Year-to-Date Period Ended June 27, 2020
We believe that our current cash, cash equivalents, cash generated from operations, and amounts available under our bank revolving line of credit will be sufficient to meet our anticipated working capital and capital expenditure requirements for at least the next 12 months.
General. During the fiscal year-to-date period ended June 27, 2020, cash and cash equivalents decreased by $6.8 million. We completed the period with cash and cash equivalents of $18.8 million. The principal drivers of the reduction of cash were payment of a significant portion of our fiscal 2019 performance bonuses in the first and second quarters of 2020, the funding of forgivable loans, the repurchase of shares, and capital expenditures related to the buildout of the new Oakland and New York office spaces, offset by net borrowings of $59.0 million.